G-protein
/ˈdʒiː ˌproʊtiːn/
A family of proteins that act as molecular switches inside cells, transmitting signals from a variety of stimuli outside a cell to its interior.
G-protein coupled receptor
/ˈdʒiː ˌproʊtiːn ˈkʌpəld rɪˈsɛptər/
A large family of cell surface receptors that respond to a variety of external signals (GPCRs).
Gait
/ɡeɪt/
A person's manner of walking, which can be diagnostic of various neurological or muscular conditions.
Gait, Ataxic
/ɡeɪt əˈtæksɪk/
An unsteady, staggering gait often seen in patients with cerebellar damage.
Galactagogue
/ɡəˈlæktəˌɡɒɡ/
A substance that promotes or increases the flow of a mother's milk.
Galactocele
/ɡəˈlæktəˌsiːl/
A milk-filled cyst caused by the obstruction of a milk duct.
Galactose
/ɡəˈlæktoʊs/
A simple sugar that is a constituent of lactose (milk sugar).
Galactosemia
/ɡəˌlæktoʊˈsiːmiə/
A rare genetic metabolic disorder that affects an individual's ability to metabolize the sugar galactose properly.
Galeazzi fracture
/ˌɡæliˈætsi ˈfræktʃər/
A fracture of the distal third of the radius with dislocation of the distal radioulnar joint.
Gallbladder
/ˈɡɔːlˌblædər/
A small pear-shaped organ beneath the liver, in which bile is stored after secretion by the liver and before release into the intestine.
Gallop rhythm
/ˈɡæləp ˈrɪðəm/
An abnormal heart rhythm marked by the presence of three or four heart sounds, resembling the sound of a galloping horse.
Gallstone
/ˈɡɔːlstoʊn/
A small, hard crystalline mass formed in the gallbladder or bile ducts from bile pigments, cholesterol, and calcium salts.
Gamete
/ˈɡæmiːt/
A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote.
Gametogenesis
/ˌɡæmitoʊˈdʒɛnəsɪs/
The process in which cells undergo meiosis to form gametes.
Gamma Globulin
/ˈɡæmə ˈɡlɒbjʊlɪn/
A protein found in blood plasma that contains most of the antibodies; often used to boost immunity against specific diseases.
Ganglion
/ˈɡæŋɡliən/
A structure containing a number of nerve cell bodies, typically linked by synapses, and often forming a swelling on a nerve fiber.
Ganglioside
/ˈɡæŋɡliəˌsaɪd/
A type of sphingolipid found in cell membranes, particularly in the gray matter of the brain.
Gangrene
/ˈɡæŋɡriːn/
Localized death and decomposition of body tissue, resulting from either obstructed circulation or bacterial infection.
Gargoylism
/ˈɡɑːrɡɔɪlˌɪzəm/
An older, largely obsolete term for Hurler syndrome, characterized by coarse facial features and skeletal deformities.
Gastralgia
/ɡæˈstrældʒə/
Pain in the stomach or the epigastric region.
Gastrectomy
/ɡæˈstrɛktəmi/
Surgical removal of a part or the whole of the stomach.
Gastric Juice
/ˈɡæstrɪk dʒuːs/
A thin, watery, acidic digestive fluid secreted by the stomach glands.
Gastrin
/ˈɡæstrɪn/
A hormone which stimulates secretion of gastric juice and is secreted into the blood by the stomach wall in response to the presence of food.
Gastrinoma
/ˌɡæstrɪˈnoʊmə/
A tumor, usually in the pancreas or duodenum, that secretes excessive gastrin, leading to stomach ulcers.
Gastritis
/ɡæˈstraɪtɪs/
Inflammation of the lining of the stomach.
Gastrocnemius
/ˌɡæstrɒkˈniːmiəs/
The chief muscle of the calf of the leg, which flexes the knee and foot.
Gastroduodenal
/ˌɡæstroʊˌduːəˈdiːnəl/
Relating to the stomach and the duodenum.
Gastroenteritis
/ˌɡæstroʊˌɛntəˈraɪtɪs/
Inflammation of the stomach and intestines, typically resulting from bacterial toxins or viral infection and causing vomiting and diarrhea.
Gastroesophageal Reflux
/ˌɡæstroʊɪˌsɒfəˈdʒiːəl ˈriːflʌks/
A digestive disorder that occurs when acidic stomach juices, or food and fluids, back up from the stomach into the esophagus (GERD).
Gastrojejunostomy
/ˌɡæstroʊˌdʒɛdʒʊˈnɒstəmi/
A surgical procedure that creates a connection between the stomach and the jejunum (middle part of the small intestine).
Gastroparesis
/ˌɡæstroʊpəˈriːsɪs/
A condition that affects the stomach muscles and prevents proper stomach emptying.
Gastroschisis
/ɡæˈstrɒskɪsɪs/
A birth defect in which the baby's intestines extend outside of the body through a hole next to the belly button.
Gastroscopy
/ɡæˈstrɒskəpi/
An examination of the upper digestive tract (the esophagus, stomach, and duodenum) using a thin, flexible tube called a gastroscope.
Gastrulation
/ˌɡæstrʊˈleɪʃən/
An early phase in the embryonic development during which the single-layered blastula is reorganized into a multilayered structure known as the gastrula.
Gaucher's disease
/ɡoʊˈʃeɪz dɪˈziːz/
A genetic disorder resulting from the buildup of fatty substances in certain organs, especially the spleen and liver.
Gemellus
/dʒɛˈmɛləs/
Either of two small muscles (superior and inferior) located in the posterior hip region.
Gene
/dʒiːn/
A unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
Gene Expression
/dʒiːn ɪkˈsprɛʃən/
The process by which the information encoded in a gene is used to direct the assembly of a protein molecule.
Gene locus
/dʒiːn ˈloʊkəs/
The specific physical location of a gene or other DNA sequence on a chromosome.
General anesthesia
/ˈdʒɛnərəl ˌænəsˈθiːziə/
A medically induced coma with loss of protective reflexes, resulting from the administration of one or more general anesthetic agents.
Genetic Mapping
/dʒəˈnɛtɪk ˈmæpɪŋ/
The methods used to identify the locus of a gene and the distances between genes.
Genicular
/dʒəˈnɪkjʊlər/
Relating to the knee joint.
Geniohyoid
/ˌdʒiːnioʊˈhaɪɔɪd/
A narrow muscle situated above the mylohyoid muscle that pulls the hyoid bone forward and upward.
Genital
/ˈdʒɛnɪtəl/
Relating to the human or animal reproductive organs.
Genome
/ˈdʒiːnoʊm/
The haploid set of chromosomes in a gamete or microorganism, or in each cell of a multicellular organism.
Genotype
/ˈdʒiːnəˌtaɪp/
The genetic constitution of an individual organism.
Genu
/ˈdʒiːnuː/
The knee; or any anatomical structure shaped like a bent knee, such as the genu of the corpus callosum.
Genu Valgum
/ˈdʒiːnuː ˈvælɡəm/
A condition in which the knees tilt inward while the ankles remain spaced apart; commonly called 'knock-knee'.
Genu Varum
/ˈdʒiːnuː ˈvɛərəm/
A physical deformity marked by outward bowing of the lower leg in relation to the thigh; commonly called 'bow-leg'.
Genupectoral position
/ˌdʒɛnjuːˈpɛktərəl pəˈzɪʃən/
The knee-chest position; a physical position where the patient rests on their knees and chest, used for certain rectal or pelvic exams.
Geriatrics
/ˌdʒɛriˈætrɪks/
The branch of medicine or social science dealing with the health and care of old people.
Germ Cell
/dʒɜːrm sɛl/
A cell containing half the number of chromosomes of a somatic cell and able to unite with one from the opposite sex to form a new individual; a gamete.
Germ layer
/dʒɜːrm ˈleɪər/
One of the three primary cell layers (ectoderm, mesoderm, endoderm) formed during early embryonic development.
Germicide
/ˈdʒɜːrmɪˌsaɪd/
An agent that kills germs, especially pathogenic microorganisms.
Gerodontics
/ˌdʒɛrəˈdɒntɪks/
The branch of dentistry dealing with the dental problems and care of older people.
Gestation
/dʒɛˈsteɪʃən/
The process or period of developing inside the womb between conception and birth.
Gestational diabetes
/dʒɛˈsteɪʃənəl ˌdaɪəˈbiːtiːz/
A condition in which a woman without diabetes develops high blood sugar levels during pregnancy.
Ghrelin
/ˈɡrɛlɪn/
A hormone produced in the stomach that stimulates appetite and signals the brain to eat.
Giant cell
/ˈdʒaɪənt sɛl/
A very large cell, such as an osteoclast, or a mass formed by the fusion of several cells, often seen in chronic inflammation.
Giardiasis
/ˌdʒiːɑːrˈdaɪəsɪs/
An infection in the small intestine caused by a microscopic parasite called Giardia lamblia.
Gigantism
/dʒaɪˈɡæntɪzəm/
Abnormal growth due to an excess of growth hormone during childhood, before the bone growth plates have closed.
Gingiva
/ˈdʒɪndʒɪvə/
The gums; the tissue that surrounds the necks of teeth and covers the alveolar parts of the jaws.
Gingivectomy
/ˌdʒɪndʒɪˈvɛktəmi/
The surgical removal of gum tissue.
Gingivitis
/ˌdʒɪndʒɪˈvaɪtɪs/
Inflammation of the gums, or gingiva.
Ginglymus
/ˈdʒɪŋɡlɪməs/
A hinge joint, such as the elbow or knee, which allows movement in only one plane.
Glabella
/ɡləˈbɛlə/
The smooth part of the forehead above and between the eyebrows.
Gland
/ɡlænd/
An organ in the human or animal body which secretes particular chemical substances for use in the body or for discharge into the surroundings.
Glans Penis
/ɡlænz ˈpiːnɪs/
The sensitive bulbous structure at the distal end of the human penis.
Glasgow Coma Scale
/ˈɡlæzɡoʊ ˈkoʊmə skeɪl/
A clinical scale used to reliably measure a person's level of consciousness after a brain injury (GCS).
Glaucoma
/ɡlɔːˈkoʊmə/
A condition of increased pressure within the eyeball, causing gradual loss of sight.
Glaucoma, Angle-closure
/ɡlɔːˈkoʊmə ˈæŋɡəl ˈkloʊʒər/
A medical emergency where the drainage angle of the eye becomes blocked, leading to a sudden rise in intraocular pressure.
Gleet
/ɡliːt/
A thin, morbid discharge from a mucous membrane, especially from the urethra in chronic gonorrhea.
Glenoid Cavity
/ˈɡliːnɔɪd ˈkævɪti/
A shallow depression on a bone into which another bone fits to form a joint, especially that on the scapula into which the head of the humerus fits.
Glia
/ˈɡliːə/
The connective tissue of the nervous system, consisting of several different types of cells associated with neurons.
Glioblastoma
/ˌɡliːoʊblæˈstoʊmə/
A malignant tumor affecting the brain or spine.
Glioblastoma multiforme
/ˌɡliːoʊblæˈstoʊmə ˌmʌltɪˈfɔːrmi/
The most aggressive and common type of malignant primary brain tumor in humans.
Glioma
/ɡlaɪˈoʊmə/
A type of tumor that starts in the glial cells of the brain or spine.
Gliosis
/ɡlaɪˈoʊsɪs/
A nonspecific reactive change of glial cells in response to damage to the central nervous system, often resulting in a scar.
Glisson's capsule
/ˈɡlɪsənz ˈkæpsuːl/
A layer of connective tissue surrounding the liver and ensheathing the hepatic artery, portal vein, and bile ducts.
Globulin
/ˈɡlɒbjʊlɪn/
A group of proteins in blood plasma that are insoluble in pure water but soluble in dilute salt solutions; includes antibodies and transport proteins.
Glomerulonephritis
/ɡloʊˌmɛrjʊloʊnəˈfraɪtɪs/
Acute inflammation of the kidney, typically caused by an immune response.
Glomerulus
/ɡloʊˈmɛrjʊləs/
A cluster of nerve endings, spores, or small blood vessels, in particular a cluster of capillaries around the end of a kidney tubule.
Glomus tumor
/ˈɡloʊməs ˈtuːmər/
A rare, usually benign neoplasm arising from the glomus body, often found under the fingernails.
Glossitis
/ɡlɒˈsaɪtɪs/
Inflammation of the tongue.
Glossodynia
/ˌɡlɒsoʊˈdɪniə/
A chronic condition characterized by a burning sensation in the tongue with no apparent cause.
Glossopharyngeal nerve
/ˌɡlɒsoʊfəˈrɪndʒiəl nɜːrv/
The ninth cranial nerve (CN IX), which supplies the tongue and pharynx, providing both sensory and motor functions.
Glottis
/ˈɡlɒtɪs/
The part of the larynx consisting of the vocal cords and the slit-like opening between them.
Glottis, Edema of
/ˈɡɒtɪs ɪˈdiːmə/
Swelling of the laryngeal tissues, which can lead to life-threatening airway obstruction.
Glucagon
/ˈɡluːkəˌɡɒn/
A hormone formed in the pancreas that promotes the breakdown of glycogen to glucose in the liver.
Glucagonoma
/ˌɡluːkəɡəˈnoʊmə/
A rare tumor of the alpha cells of the pancreas that results in the overproduction of the hormone glucagon.
Glucocorticoid
/ˌɡluːkoʊˈkɔːrtɪkɔɪd/
Any of a group of corticosteroids (e.g., cortisol) that are involved in the metabolism of carbohydrates, proteins, and fats and have anti-inflammatory activity.
Glucokinase
/ˌɡluːkoʊˈkaɪneɪs/
An enzyme that facilitates phosphorylation of glucose to glucose-6-phosphate, primarily in the liver and pancreas.
Glucometer
/ɡluːˈkɒmɪtər/
A medical device for determining the approximate concentration of glucose in the blood.
Gluconeogenesis
/ˌɡluːkoʊˌniːoʊˈdʒɛnəsɪs/
The metabolic process by which organisms produce sugars (namely glucose) for catabolic reactions from non-carbohydrate precursors.
Glucose
/ˈɡluːkoʊs/
A simple sugar which is an important energy source in living organisms and is a component of many carbohydrates.
Glucose tolerance test
/ˈɡluːkoʊs ˈtɒlərəns tɛst/
A medical test in which glucose is given and blood samples taken afterward to determine how quickly it is cleared from the blood.
Glucosuria
/ˌɡluːkoʊˈsjʊəriə/
The excretion of glucose into the urine; ordinarily, urine contains no glucose.
Gluteal
/ˈɡluːtiəl/
Relating to the gluteus muscles in the buttocks.
Gluteus Maximus
/ˈɡluːtiəs ˈmæksɪməs/
The largest and outermost of the three gluteal muscles in each human buttock.
Gluteus Medius
/ˈɡluːtiəs ˈmiːdiəs/
One of the three gluteal muscles; it is situated on the outer surface of the pelvis and is crucial for hip abduction and stabilization.
Gluteus Minimus
/ˈɡluːtiəs ˈmɪnɪməs/
The smallest of the three gluteal muscles, lying immediately beneath the gluteus medius.
Glycemic Index
/ɡlaɪˈsiːmɪk ˈɪndɛks/
A system that ranks foods on a scale from 1 to 100 based on their effect on blood-sugar levels.
Glyceride
/ˈɡlɪsəˌraɪd/
A fatty acid ester of glycerol; the major components of animal and vegetable fats and oils.
Glyceride
/ˈɡlɪsəraɪd/
An ester formed from glycerol and fatty acids; the main constituent of body fat.
Glycerol
/ˈɡlɪsəˌrɒl/
A colorless, sweet, viscous liquid formed as a byproduct of soap manufacture; it is the backbone of triglycerides.
Glycocholic acid
/ˌɡlaɪkoʊˌkoʊlɪk ˈæsɪd/
A bile acid that aids in the emulsification and digestion of fats.
Glycogen
/ˈɡlaɪkədʒən/
A substance deposited in bodily tissues as a store of carbohydrates; it is a polysaccharide which yields glucose on hydrolysis.
Glycogenesis
/ˌɡlaɪkoʊˈdʒɛnəsɪs/
The formation of glycogen from sugar.
Glycogenolysis
/ˌɡlaɪkədʒəˈnɒlɪsɪs/
The breakdown of glycogen to glucose-1-phosphate and glycogen.
Glycolysis
/ɡlaɪˈkɒlɪsɪs/
The breakdown of glucose by enzymes, releasing energy and pyruvic acid.
Glycoprotein
/ˌɡlaɪkoʊˈproʊtiːn/
Any of a class of proteins that have carbohydrate groups attached to the polypeptide chain.
Glycoside
/ˈɡlaɪkəˌsaɪd/
A compound formed from a simple sugar and another compound by replacement of a hydroxyl group in the sugar molecule.
Glycosuria
/ˌɡlaɪkoʊˈsjʊəriə/
The presence of reducing sugars in the urine, such as glucose.
Gnathic
/ˈnæθɪk/
Of or relating to the jaw.
Goblet cell
/ˈɡɒblɪt sɛl/
A column-shaped cell found in the respiratory and intestinal tracts, which secretes the main component of mucus.
Goblet cell
/ˈɡɒblɪt sɛl/
A glandular, modified simple columnar epithelial cell whose function is to secrete gel-forming mucins.
Goiter
/ˈɡɔɪtər/
A swelling of the neck resulting from enlargement of the thyroid gland.
Goiter, Toxic
/ˈɡɔɪtər ˈtɒksɪk/
An enlarged thyroid gland that is associated with hyperthyroidism (excessive thyroid hormone production).
Golgi apparatus
/ˈɡɒldʒi ˌæpəˈrætəs/
A complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
Golgi tendon organ
/ˈɡɒldʒi ˈtɛndən ˈɔːrɡən/
A proprioceptive sensory receptor organ that senses changes in muscle tension.
Golgi tendon reflex
/ˈɡɒldʒi ˈtɛndən ˈriːflɛks/
A protective feedback mechanism that causes muscle relaxation to prevent damage from excessive tension.
Gomphosis
/ɡɒmˈfoʊsɪs/
A type of fibrous joint that binds the teeth to bony sockets in the maxillary bone and mandible.
Gomphosis
/ɡɒmˈfoʊsɪs/
A specialized fibrous joint that anchors the root of a tooth into its bony socket.
Gonad
/ˈɡoʊnæd/
An organ that produces gametes; a testis or ovary.
Gonadotropin
/ɡəˌnædəˈtroʊpɪn/
Any of a group of hormones secreted by the pituitary gland which stimulate the activity of the gonads.
Gonadotropin-releasing hormone
/ɡoʊˌnædəˈtroʊpɪn rɪˈliːsɪŋ ˈhɔːrmoʊn/
A hormone produced in the hypothalamus that stimulates the release of FSH and LH from the pituitary gland (GnRH).
Goniometry
/ˌɡoʊniˈɒmɪtri/
The measurement of angles, specifically those of range of motion in joints.
Goniotomy
/ˌɡoʊniˈɒtəmi/
A surgical procedure for treating congenital glaucoma by opening the drainage canals of the eye.
Gonococcus
/ˌɡɒnəˈkɒkəs/
A bacterium (Neisseria gonorrhoeae) that causes gonorrhea.
Gonorrhea
/ˌɡɒnəˈriːə/
A venereal disease involving inflammatory discharge from the urethra or vagina.
Gout
/ɡaʊt/
A disease in which defective metabolism of uric acid causes arthritis, especially in the smaller bones of the feet.
Gouty tophus
/ˈɡaʊti ˈtoʊfəs/
A deposit of uric acid crystals, in the form of monosodium urate, in people with high levels of uric acid in the blood (hyperuricemia).
Graafian follicle
/ˈɡræfiən ˈfɒlɪkəl/
A fluid-filled structure in the mammalian ovary within which an ovum develops before ovulation.
Graafian follicle
/ˈɡræfiən ˈfɒlɪkəl/
A fluid-filled structure in the mammalian ovary within which an ovum develops before ovulation; also called a mature ovarian follicle.
Gracilis
/ˈɡræsɪlɪs/
The most superficial muscle on the medial side of the thigh; it adduction the hip and flexes the knee.
Graft
/ɡræft/
A piece of living tissue that is transplanted surgically.
Graft-versus-host disease
/ɡræft ˈvɜːrsəs hoʊst dɪˈziːz/
A condition that occurs after a bone marrow or stem cell transplant in which the donated cells attack the recipient's body (GVHD).
Gram stain
/ɡræm steɪn/
A method of staining used to differentiate bacterial species into two large groups (gram-positive and gram-negative).
Gram-negative
/ɡræm ˈnɛɡətɪv/
Bacteria that do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation; they typically have a thinner peptidoglycan layer.
Gram-positive
/ɡræm ˈpɒzɪtɪv/
Bacteria that give a positive result in the Gram stain test by taking up the crystal violet stain; they have a thick peptidoglycan cell wall.
Grand mal
/ˌɡrænd ˈmæl/
A former term for a tonic-clonic seizure, characterized by loss of consciousness and violent muscle contractions.
Grand mal seizure
/ˌɡrænd ˈmæl ˈsiːʒər/
A type of seizure that involves a loss of consciousness and violent muscle contractions; now more commonly termed a generalized tonic-clonic seizure.
Granular layer
/ˈɡrænjʊlər ˈleɪər/
The stratum granulosum; a layer of the epidermis where keratinocytes begin to lose their nuclei and cytoplasm becomes granular.
Granular leucocyte
/ˈɡrænjʊlər ˈluːkəˌsaɪt/
A white blood cell with secretory granules in its cytoplasm, e.g., an eosinophil or a basophil.
Granulation tissue
/ˌɡrænjʊˈleɪʃən ˈtɪʃuː/
New vascular tissue in granular form on an ulcer or the healing surface of a wound.
Granulocyte
/ˈɡrænjʊləˌsaɪt/
A white blood cell with secretory granules in its cytoplasm, such as a neutrophil, basophil, or eosinophil.
Granulocytopenia
/ˌɡrænjʊloʊˌsaɪtəˈpiːniə/
A marked decrease in the number of granulocytes (neutrophils, eosinophils, and basophils) in the blood.
Granuloma
/ˌɡrænjʊˈloʊmə/
A mass of granulation tissue, typically produced in response to infection, inflammation, or the presence of a foreign substance.
Granulomatous
/ˌɡrænjʊˈloʊmətəs/
Relating to or characterized by granulomas, which are small areas of inflammation.
Granulosa cells
/ˌɡrænjʊˈloʊsə sɛlz/
Somatic cells of the sex cord that are closely associated with the developing female gamete in the ovary.
Gravel
/ˈɡrævəl/
Small calculous concretions in the kidneys or bladder.
Gravel, Urinary
/ˈɡrævəl ˈjʊərɪˌnɛri/
Small calculous concretions formed in the kidneys or bladder, which may be passed in the urine.
Graves' disease
/ɡreɪvz dɪˈziːz/
A swelling of the thyroid gland (goiter) and protrusion of the eyeballs (exophthalmos), caused by an overactive thyroid.
Gravid
/ˈɡrævɪd/
A medical term meaning pregnant; often used in clinical notes to indicate the number of times a woman has been pregnant (e.g., Gravida 2).
Gravidogram
/ˈɡrævɪdəˌɡræm/
A clinical chart used to monitor the progress of pregnancy, typically recording symphysis-fundal height.
Gravitational edema
/ˌɡrævɪˈteɪʃənəl ɪˈdiːmə/
Swelling caused by fluid accumulation in the lower limbs due to the effects of gravity, often seen in the ankles after long periods of standing.
Gray matter
/ɡreɪ ˈmætər/
The darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites.
Gray matter
/ɡreɪ ˈmætər/
The darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites.
Great vessels
/ɡreɪt ˈvɛsəlz/
The large arteries and veins that bring blood to and from the heart, including the aorta, pulmonary trunk, and venae cavae.
Greenstick fracture
/ˈɡriːnstɪk ˈfræktʃər/
An incomplete fracture in which one side of the bone is broken and the other side is bent; most common in children.
Greenstick fracture
/ˈɡriːnstɪk ˈfræktʃər/
A fracture in a young, soft bone in which the bone bends and breaks, but does not completely separate.
Grisel's syndrome
/ɡriːˈzɛlz ˈsɪndroʊm/
Non-traumatic subluxation of the atlanto-axial joint caused by inflammation of adjacent soft tissues.
Grisolle's sign
/ɡriːˈzoʊlz saɪn/
A diagnostic sign for smallpox: if the skin is stretched, a papule feels hard to the touch.
Groin
/ɡrɔɪn/
The area of the body where the abdomen meets the upper thighs; the inguinal region.
Growth hormone
/ɡroʊθ ˈhɔːrmoʊn/
A peptide hormone that stimulates growth, cell reproduction, and cell regeneration; also known as somatotropin.
Grumous
/ˈɡruːməs/
Clotted or lumpy; often used to describe the appearance of certain pathological fluids or discharges.
Guaifenesin
/ˌɡwaɪˈfɛnəsɪn/
An expectorant drug used to help clear phlegm or mucus from the chest and throat.
Guanine
/ˈɡwɑːniːn/
One of the four main nucleobases found in the nucleic acids DNA and RNA; it pairs with cytosine.
Guanosine
/ˈɡwɑːnəˌsiːn/
A purine nucleoside comprising guanine attached to a ribose sugar ring.
Gubernaculum
/ˌɡuːbərˈnækjʊləm/
A fibrous cord that connects the fetal testis or ovary to the floor of the scrotum or labium majus, guiding its descent.
Gubernaculum
/ˌɡuːbərˈnækjʊləm/
A fibrous cord that connects the fetal testis or ovary to the floor of the scrotum or labium majus, guiding its descent.
Guillain-Barré syndrome
/ɡiːˈjæn bɑːˈreɪ ˈsɪndroʊm/
A rare neurological disorder in which the body's immune system mistakenly attacks part of its peripheral nervous system.
Guillain-Barré syndrome
/ɡiːˈjæn bɑːˈreɪ ˈsɪndroʊm/
An acute, rapidly progressing inflammatory demyelinating polyneuropathy of the peripheral nerves.
Guinea worm
/ˈɡɪni wɜːrm/
Dracunculus medinensis; a parasitic nematode that causes dracunculiasis.
Guinea worm disease
/ˈɡɪni wɜːrm dɪˈziːz/
A parasitic infection caused by the nematode Dracunculus medinensis, contracted by drinking contaminated water.
Gull's disease
/ɡʌlz dɪˈziːz/
An older name for adult-onset myxedema (hypothyroidism).
Gum
/ɡʌm/
Common term for the gingiva; the firm connective tissue surrounding the teeth.
Gum
/ɡʌm/
Common term for the gingiva; the fibrous tissue that covers the alveolar processes of the jaws.
Gumma
/ˈɡʌmə/
A small, soft, noncancerous growth characteristic of the tertiary stage of syphilis.
Gumma
/ˈɡʌmə/
A soft, noncancerous growth characteristic of the tertiary stage of syphilis.
Gustation
/ɡʌˈsteɪʃən/
The physical act or the sense of tasting.
Gustation
/ɡʌˈsteɪʃən/
The physical act or the sense of tasting.
Gustatory
/ˈɡʌstəˌtɔːri/
Relating to the sense of taste.
Gustatory nerve
/ˈɡʌstəˌtɔːri nɜːrv/
Nerves that carry taste impulses from the tongue to the brain.
Gut
/ɡʌt/
The stomach or intestines; the alimentary canal or a portion of it.
Gut
/ɡʌt/
A general term for the stomach or intestines; the alimentary canal.
Guthrie test
/ˈɡʌθri tɛst/
A screening test for phenylketonuria (PKU) performed on newborns using a drop of blood from a heel prick.
Guthrie test
/ˈɡʌθri tɛst/
A diagnostic test used to screen for phenylketonuria (PKU) in newborn infants.
Guttate
/ˈɡʌteɪt/
Having the shape of a drop; often used to describe certain types of psoriasis lesions.
Gynecology
/ˌɡaɪnɪˈkɒlədʒi/
The branch of physiology and medicine which deals with the functions and diseases specific to women and girls, especially those affecting the reproductive system.
Gynecomastia
/ˌɡaɪnɪkoʊˈmæstiə/
Enlargement of a man's breasts, usually due to hormone imbalance or hormone therapy.
Gynoplasty
/ˈɡaɪnəˌplæsti/
Plastic or restorative surgery of the female reproductive organs.
Gyrus
/ˈdʒaɪrəs/
A ridge or fold between two clefts on the cerebral surface in the brain.
Gyrus
/ˈdʒaɪrəs/
A ridge or fold on the cerebral cortex of the brain (plural: gyri).
Gyrus, Angular
/ˈæŋɡjʊlər ˈdʒaɪrəs/
A region of the brain in the parietal lobe that is involved in language, number processing, and spatial cognition.
Gyrus, Cingulate
/ˈsɪŋɡjʊlɪt ˈdʒaɪrəs/
A gyrus situated just above the corpus callosum, involved with sensory input and emotion.
Gyrus, Postcentral
/poʊstˈsɛntrəl ˈdʒaɪrəs/
The primary somatosensory cortex; a prominent structure in the parietal lobe of the human brain.
Gyrus, Precentral
/priːˈsɛntrəl ˈdʒaɪrəs/
The primary motor cortex; a structure in the posterior frontal lobe.
Gyrus, Superior Temporal
/suːˈpɪəriər ˈtɛmpərəl ˈdʒaɪrəs/
The gyrus containing the primary auditory cortex, responsible for processing sounds.
Gyrus, Supramarginal
/ˌsuːprəˈmɑːrdʒɪnəl ˈdʒaɪrəs/
A portion of the parietal lobe involved in language perception and processing.