MedTerm Speak

Master the language of medicine

Abdomen

AB-doh-men

/ˈæbdəmən/

The part of the body between the chest and the pelvis, containing the digestive organs.

Abduction

ab-DUK-shun

/æbˈdʌkʃən/

Movement of a limb or other part away from the midline of the body.

Ablation

ab-LAY-shun

/æˈbleɪʃən/

The removal or destruction of a body part or tissue or its function, often via surgery or radiofrequency.

Abrasion

uh-BRAY-zhun

/əˈbreɪʒən/

A wearing away of the upper layer of skin as a result of applied friction or trauma.

Abscess

AB-ses

/ˈæbsɛs/

A confined pocket of pus that collects in tissues, organs, or spaces inside the body.

Acanthosis

ak-an-THOH-sis

/ˌækænˈθoʊsɪs/

Diffuse epidermal hyperplasia (thickening of the skin).

Accommodation

ah-kom-oh-DAY-shun

/əˌkɒməˈdeɪʃən/

The process by which the eye's lens changes shape to focus on near or far objects.

Acetabular

as-eh-TAB-yoo-lar

/ˌæsɪˈtæbjʊlər/

Relating to the acetabulum, the socket of the hip bone.

Acetabulum

as-eh-TAB-yoo-lum

/ˌæsɪˈtæbjʊləm/

The cup-shaped socket of the hip bone that receives the head of the femur.

Achalasia

ak-ah-LAY-zhah

/ˌækəˈleɪziə/

A condition where the muscles of the lower part of the esophagus fail to relax, preventing food from passing into the stomach.

Achlorhydria

ay-klor-HY-dree-ah

/ˌeɪklɔːrˈhaɪdriə/

A state where the production of hydrochloric acid in gastric secretions of the stomach is absent or low.

Achondroplasia

ay-kon-droh-PLAY-zhah

/eɪˌkɒndrəˈpleɪziə/

A genetic disorder whose primary feature is dwarfism, caused by the failure of cartilage to convert to bone.

Acidimeter

as-ih-DIM-eh-ter

/ˌæsɪˈdɪmɪtər/

An instrument for measuring the amount of acid in a substance.

Acidosis

as-ih-DOH-sis

/ˌæsɪˈdoʊsɪs/

An overproduction of acid in the blood or an excessive loss of bicarbonate from the blood.

Acne

AK-nee

/ˈækni/

A skin condition that occurs when hair follicles become plugged with oil and dead skin cells.

Acromegaly

ak-roh-MEG-ah-lee

/ˌækrəˈmɛɡəli/

A hormonal disorder that develops when your pituitary gland produces too much growth hormone during adulthood.

Acromion

ah-KRO-mee-on

/əˈkroʊmiən/

The outward end of the spine of the shoulder blade (scapula) which forms the point of the shoulder.

Acrophobia

ak-roh-FOH-bee-ah

/ˌækrəˈfoʊbiə/

An extreme or irrational fear of heights.

Actinic

ak-TIN-ik

/ækˈtɪnɪk/

Relating to or denoting light able to cause chemical changes, as in 'actinic keratosis' caused by sun damage.

Acuity

ah-KYOO-ih-tee

/əˈkjuːɪti/

Sharpness or keenness of thought, vision, or hearing.

Acupuncture

AK-yoo-punk-chur

/ˈækjʊˌpʌŋktʃər/

A practice of inserting fine needles through the skin at specific points to cure disease or relieve pain.

Acute

ah-KYOOT

/əˈkjuːt/

Conditions or symptoms that appear suddenly and are often severe but of short duration.

Acystia

ay-SIS-tee-ah

/eɪˈsɪstiə/

The congenital absence of the urinary bladder.

Adactylia

ay-dak-TIL-ee-ah

/ˌeɪdækˈtɪliə/

The congenital absence of fingers or toes.

Adduction

ah-DUK-shun

/əˈdʌkʃən/

Movement of a limb or other part toward the midline of the body.

Adenitis

ad-eh-NY-tis

/ˌædɪˈnaɪtɪs/

Inflammation of a gland or lymph node.

Adenocarcinoma

ad-eh-no-kar-sih-NO-mah

/ˌædɪnoʊˌkɑːrsɪˈnoʊmə/

A type of cancer that forms in glandular structures, which produce fluids or mucus.

Adenohypophysis

ad-eh-no-hy-POF-ih-sis

/ˌædɪnoʊhaɪˈpɒfɪsɪs/

The anterior lobe of the pituitary gland.

Adenoidectomy

ad-eh-noy-DEK-toh-mee

/ˌædɪnɔɪˈdɛktəmi/

Surgical removal of the adenoids, often done to treat chronic infections or airway obstruction.

Adenoma

ad-eh-NOH-mah

/ˌædɪˈnoʊmə/

A benign tumor formed from glandular structures in epithelial tissue.

Adenopathy

ad-eh-NOP-ah-thee

/ˌædɪˈnɒpəθi/

Large or swollen lymph nodes; any disease or enlargement of glandular tissue.

Adhesion

ad-HEE-zhun

/ædˈhiːʒən/

Bands of scar-like tissue that form between two surfaces inside the body and cause them to stick together.

Adipose

AD-ih-pohs

/ˈædɪˌpoʊs/

Used for the storage of fat; relating to body fat.

Adiposuria

ad-ih-poh-SOO-ree-ah

/ˌædɪpoʊˈsjʊəriə/

The presence of fat in the urine.

Adjuvant

AD-joo-vant

/ˈædʒʊvənt/

A substance or therapy applied after the initial treatment to enhance its effectiveness.

Adrenal

ah-DREE-nal

/əˈdriːnəl/

Relating to the kidneys or the glands located above the kidneys.

Adrenalectomy

ah-dree-nal-EK-toh-mee

/əˌdriːnəˈlɛktəmi/

Surgical removal of one or both adrenal glands.

Adrenocorticotropic

ah-dree-no-kor-tih-ko-TRO-pik

/əˌdriːnoʊˌkɔːrtɪkoʊˈtrɒpɪk/

Relating to a hormone (ACTH) that stimulates the cortex of the adrenal glands.

Aerobe

AIR-ohb

/ˈɛəroʊb/

A microorganism which has the ability to grow and replicate in the presence of free oxygen.

Aerophagia

air-oh-FAY-jah

/ˌɛərəˈfeɪdʒə/

The excessive swallowing of air, which can cause abdominal bloating and frequent belching.

Afebrile

ay-FEB-ryl

/eɪˈfɛbraɪl/

The state of being without a fever.

Afferent

AF-er-ent

/ˈæfərənt/

Conducting or conducted inward or toward something, such as nerves towards the central nervous system.

Afterbirth

AF-ter-berth

/ˈæftərbɜːrθ/

The placenta and fetal membranes discharged from the uterus after the birth of offspring.

Agglutination

ah-gloo-tih-NAY-shun

/əˌɡluːtɪˈneɪʃən/

The clumping of particles, such as bacteria or red blood cells, when exposed to a specific antibody.

Agonal

AG-uh-nul

/ˈæɡənl/

Relating to the period just before death, often used to describe gasping breathing patterns.

Agoraphobia

ag-or-ah-FOH-bee-ah

/ˌæɡərəˈfoʊbiə/

An anxiety disorder characterized by fear of being in situations where escape might be difficult.

Agraphia

ay-GRAF-ee-ah

/eɪˈɡræfiə/

An acquired neurological disorder causing a loss in the ability to communicate through writing.

Akinesia

ay-kih-NEE-zhah

/ˌeɪkaɪˈniːziə/

Loss or impairment of the power of voluntary movement.

Albinism

AL-bih-nizm

/ˈælbɪˌnɪzəm/

A congenital absence of pigment in the skin and hair and the eyes.

Albumin

al-BYOO-min

/ælˈbjuːmɪn/

A simple form of protein that is soluble in water and coagulable by heat, found in blood serum.

Alkalosis

al-kah-LOH-sis

/ˌælkəˈloʊsɪs/

An excessively alkaline condition of the body fluids or tissues, often caused by low CO2.

Allergen

AL-er-jen

/ˈælərdʒən/

A substance that causes an allergic reaction.

Alopecia

al-oh-PEE-shah

/ˌæləˈpiːʃə/

The partial or complete absence of hair from areas of the body where it normally grows; baldness.

Alopecia

al-oh-PEE-shah

/ˌæləˈpiːʃə/

The partial or complete absence of hair from areas of the body where it normally grows.

Alveoli

al-VEE-oh-lye

/ælˈviːəˌlaɪ/

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.

Alveolitis

al-vee-oh-LY-tis

/ˌælviəˈlaɪtɪs/

Inflammation of the alveoli (air sacs) in the lungs.

Amaurosis

am-aw-ROH-sis

/ˌæmɔːˈroʊsɪs/

Partial or total blindness without visible change in the eye, typically from optic nerve disease.

Amblyopia

am-blee-OH-pee-ah

/ˌæmbliˈoʊpiə/

Reduced vision in one eye caused by abnormal visual development early in life; lazy eye.

Ambulatory

AM-byoo-lah-tor-ee

/ˈæmbjələˌtɔːri/

Relating to or adapted for walking; able to walk and not be confined to bed.

Amenorrhea

ah-men-oh-REE-ah

/eɪˌmɛnəˈriːə/

The absence of menstruation, often defined as missing one or more periods.

Amnesia

am-NEE-zhah

/æmˈniːziə/

A partial or total loss of memory.

Amniocentesis

am-nee-oh-sen-TEE-sis

/ˌæmnioʊsɛnˈtiːsɪs/

A procedure used in prenatal diagnosis in which amniotic fluid is sampled for genetic testing.

Amphiarthrosis

am-fee-ar-THROH-sis

/ˌæmfɪɑːrˈθroʊsɪs/

A type of continuous, slightly movable joint, such as the pubic symphysis.

Amputation

am-pyoo-TAY-shun

/ˌæmpjʊˈteɪʃən/

The action of surgically cutting off a limb or other body part.

Amyloidosis

am-ih-loy-DOH-sis

/ˌæmɪlɔɪˈdoʊsɪs/

A rare disease that occurs when a protein called amyloid builds up in organs.

Amyotrophic

ay-my-oh-TRO-fik

/eɪˌmaɪəˈtrɒfɪk/

Relating to muscle atrophy, as seen in Amyotrophic Lateral Sclerosis (ALS).

Anabolism

ah-NAB-oh-lizm

/əˈnæbəˌlɪzəm/

The synthesis of complex molecules in living organisms from simpler ones together with the storage of energy.

Anaerobe

AN-ah-rohb

/ˈæneɪəˌroʊb/

An organism that grows without air, or requires oxygen-free conditions to live.

Analgesic

an-al-JEE-zik

/ˌænəlˈdʒiːzɪk/

A class of drugs specifically designed to relieve pain.

Analgezia

an-al-JEE-zee-ah

/ˌænəlˈdʒiːziə/

The inability to feel pain while still conscious.

Anamnestic

an-am-NES-tik

/ˌænæmˈnɛstɪk/

Relating to a second or subsequent immune response to an antigen; also relating to medical history.

Anaphylactoid

an-ah-fih-LAK-toyd

/ˌænəfɪˈlækˌtɔɪd/

Resembling anaphylaxis but not caused by an IgE-mediated allergic reaction.

Anaphylaxis

an-ah-fih-LAK-sis

/ˌænəfəˈlæksɪs/

A severe, potentially life-threatening allergic reaction.

Anasarca

an-ah-SAR-kah

/ˌænəˈsɑːrkə/

Severe generalized edema, with widespread swelling of the skin due to effusion of fluid into the extracellular space.

Anastomosis

ah-nas-toh-MOH-sis

/əˌnæstəˈmoʊsɪs/

A surgical connection made between two structures, such as blood vessels or loops of intestine.

Anatomic

an-ah-TOM-ik

/ˌænəˈtɒmɪk/

Relating to the bodily structure of organisms and their parts.

Androgen

AN-droh-jen

/ˈændrədʒən/

A male sex hormone, such as testosterone.

Andropause

AN-droh-pawz

/ˈændrəˌpɔːz/

A collection of symptoms, including fatigue and decreased libido, experienced by some middle-aged men.

Anemia

ah-NEE-mee-ah

/əˈniːmiə/

A condition in which the blood doesn't have enough healthy red blood cells.

Anencephaly

an-en-SEF-ah-lee

/ˌænɛnˈsɛfəli/

A serious birth defect in which a baby is born without parts of the brain and skull.

Anesthesia

an-es-THEE-zhah

/ˌænəsˈθiːʒə/

Insensitivity to pain, especially as artificially induced by the administration of gases or the injection of drugs.

Anesthesiologist

an-es-thee-zee-OL-oh-jist

/ˌænəˌsθiːziˈɒlədʒɪst/

A physician specializing in perioperative care, developing anesthetic plans, and the administration of anesthetics.

Aneurysm

AN-yoo-rizm

/ˈænjəˌrɪzəm/

An excessive localized enlargement of an artery caused by a weakening of the artery wall.

Aneurysmal

an-yoo-RIZ-mul

/ˌænjʊˈrɪzməl/

Relating to or resembling an aneurysm (a bulging or weak spot in an artery).

Aneurysmorrhaphy

an-yoo-riz-MOR-ah-fee

/ˌænjərɪzˈmɒrəfi/

The surgical suture of an aneurysm.

Angiectasis

an-jee-EK-tah-sis

/ˌændʒiˈɛktəsɪs/

Abnormal dilation or expansion of a blood vessel.

Angina

an-JY-nah

/ænˈdʒaɪnə/

A type of chest pain caused by reduced blood flow to the heart.

Angioedema

an-jee-oh-eh-DEE-mah

/ˌændʒioʊɪˈdiːmə/

Swelling of the area beneath the skin, similar to urticaria (hives) but occurring in deeper layers.

Angiogenesis

an-jee-oh-JEN-eh-sis

/ˌændʒioʊˈdʒɛnɪsɪs/

The physiological process through which new blood vessels form from pre-existing vessels.

Angiography

an-jee-OG-rah-fee

/ˌændʒiˈɒɡrəfi/

Radiographic visualization of the blood vessels after injection of a radiopaque substance.

Angioma

an-jee-OH-mah

/ænˈdʒioʊmə/

A benign tumor derived from cells of the vascular or lymphatic vessel walls.

Angioplasty

AN-jee-oh-plas-tee

/ˈændʒioʊˌplæsti/

Surgical repair or unblocking of a blood vessel, especially a coronary artery.

Angiospasm

AN-jee-oh-spazm

/ˈændʒioʊˌspæzəm/

Spasmodic contraction of the muscular lining of the blood vessels.

Anhedonia

an-hee-DOH-nee-ah

/ˌænhiːˈdoʊniə/

The inability to feel pleasure in normally pleasurable activities.

Anhidrosis

an-hi-DROH-sis

/ˌænhɪˈdroʊsɪs/

The inability to sweat normally.

Anisocoria

an-eye-so-KOR-ee-ah

/ˌænaɪsəˈkɔːriə/

A condition characterized by an unequal size of the eyes' pupils.

Anisocytosis

an-eye-so-sy-TOH-sis

/ˌænaɪsoʊsaɪˈtoʊsɪs/

A medical term meaning that a patient's red blood cells are of unequal size.

Ankylosis

ang-kih-LOH-sis

/ˌæŋkɪˈloʊsɪs/

Abnormal stiffening and immobility of a joint due to fusion of the bones.

Anomaly

ah-NOM-ah-lee

/əˈnɒməli/

Something that deviates from what is standard, normal, or expected in a medical context.

Anorchism

an-OR-kizm

/ænˈɔːrkɪzəm/

The congenital absence of one or both testes.

Anorexia

an-oh-REK-see-ah

/ˌænəˈrɛksiə/

An emotional disorder characterized by an obsessive desire to lose weight by refusing to eat.

Anorexiant

an-oh-REK-see-ant

/ˌænəˈrɛksiənt/

A drug or agent that tends to reduce or suppress the appetite.

Anosmia

an-OZ-mee-ah

/æˈnɒzmiə/

The loss of the sense of smell, either total or partial.

Anoxemia

an-ok-SEE-mee-ah

/ˌænɒkˈsiːmiə/

An abnormally low concentration of oxygen in the arterial blood.

Anoxia

an-OK-see-ah

/æˈnɒksiə/

An absence or deficiency of oxygen reaching the tissues; severe hypoxia.

Antacid

ant-AS-id

/æntˈæsɪd/

A substance which neutralizes stomach acidity and is used to relieve heartburn or indigestion.

Antagonist

an-TAG-on-ist

/ænˈtæɡənɪst/

A substance that stops the action or effect of another substance, such as a drug or muscle.

Anteflexion

an-tee-FLEK-shun

/ˌæntiˈflɛkʃən/

The normal forward displacement or bending of an organ, especially the uterus.

Antepartum

an-tee-PAR-tum

/ˌæntiˈpɑːrtəm/

Occurring or existing before birth; the period before childbirth.

Anterior

an-TEER-ee-or

/ænˈtɪəriər/

Nearer the front, especially situated in the front of the body or nearer to the head.

Anthelmintic

an-thel-MIN-tik

/ˌænθɛlˈmɪntɪk/

A group of antiparasitic drugs that expel parasitic worms and other internal parasites from the body.

Anthracosis

an-thrah-KOH-sis

/ˌænθrəˈkoʊsɪs/

A lung disease caused by the inhalation of coal dust; also known as black lung.

Antibody

AN-tih-bod-ee

/ˈæntɪˌbɒdi/

A blood protein produced in response to and counteracting a specific antigen.

Anticholinergic

an-tee-koh-lin-ER-jik

/ˌæntikoʊlɪˈnɜːrdʒɪk/

Substances that block the action of the neurotransmitter acetylcholine in the central and peripheral nervous system.

Anticoagulant

an-tee-koh-AG-yoo-lant

/ˌæntikoʊˈæɡjʊlənt/

A substance that prevents or reduces coagulation of blood, prolonging the clotting time.

Antidiuretic

an-tee-dy-yoo-RET-ik

/ˌæntidaɪjʊˈrɛtɪk/

A substance that helps to control fluid balance in the body by reducing the amount of water passed out in the urine.

Antiemetic

an-tee-eh-MET-ik

/ˌæntiiˈmɛtɪk/

A drug that is effective against vomiting and nausea.

Antigen

AN-tih-jen

/ˈæntɪdʒən/

A toxin or other foreign substance which induces an immune response in the body.

Antigenicity

an-tih-jen-IS-ih-tee

/ˌæntɪdʒəˈnɪsɪti/

The capacity of a chemical structure to bind specifically with a group of certain products that have adaptive immunity.

Antineoplastic

an-tee-nee-oh-PLAS-tik

/ˌæntiniːoʊˈplæstɪk/

Acting to prevent, inhibit or halt the development of a neoplasm (tumor).

Antipyretic

an-tee-py-RET-ik

/ˌæntipaɪˈrɛtɪk/

A substance or medication used to prevent or reduce fever.

Antiseptic

an-tih-SEP-tik

/ˌæntɪˈsɛptɪk/

Substances that prevent the growth of disease-causing microorganisms.

Antitoxin

an-tee-TOK-sin

/ˌæntɪˈtɒksɪn/

An antibody that is capable of neutralizing a specific toxin.

Anuria

an-YOO-ree-ah

/æˈnjʊəriə/

Failure of the kidneys to produce urine.

Anus

AY-nus

/ˈeɪnəs/

The opening at the end of the alimentary canal through which solid waste matter leaves the body.

Anxiolytic

ang-zy-oh-LIT-ik

/ˌæŋzioʊˈlɪtɪk/

A medication or other intervention that inhibits anxiety.

Aorta

ay-OR-tah

/eɪˈɔːrtə/

The main artery of the body, supplying oxygenated blood to the circulatory system.

Aortography

ay-or-TOG-rah-fee

/ˌeɪɔːrˈtɒɡrəfi/

A procedure that involves the injection of contrast medium into the aorta to view it via X-ray.

Apex

AY-peks

/ˈeɪpɛks/

The top or highest part of something, especially one forming a point, such as the apex of the heart or lung.

Aphagia

ah-FAY-jah

/əˈfeɪdʒə/

The inability or refusal to swallow.

Aphakia

ah-FAY-kee-ah

/əˈfeɪkiə/

The absence of the lens of the eye, due to surgical removal, a perforating wound or ulcer, or congenital defect.

Aphasia

ah-FAY-zhah

/əˈfeɪʒə/

A language disorder that affects a person's ability to communicate.

Aphonia

ay-FOH-nee-ah

/eɪˈfoʊniə/

Loss of ability to speak through disease of or damage to the larynx or mouth.

Aplasia

ah-PLAY-zhah

/əˈpleɪziə/

The failure of an organ or tissue to develop or to function normally.

Apnea

AP-nee-ah

/æpˈniːə/

Temporary cessation of breathing, especially during sleep.

Apocrine

AP-oh-krin

/ˈæpəkrɪn/

Relating to multicellular glands that release some of their cytoplasm in their secretions, especially sweat glands.

Aponeurosis

ap-oh-nyoo-ROH-sis

/ˌæpənjʊˈroʊsɪs/

A sheet of pearly-white fibrous tissue that takes the place of a tendon in sheetlike muscles having a wide area of attachment.

Apoplexy

AP-oh-plek-see

/ˈæpəˌplɛksi/

Unconsciousness or incapacity resulting from a cerebral hemorrhage or stroke.

Apoptosis

ap-oh-TOH-sis

/ˌæpəpˈtoʊsɪs/

The death of cells which occurs as a normal and controlled part of an organism's growth or development.

Appendectomy

ap-en-DEK-toh-mee

/ˌæpənˈdɛktəmi/

A surgical operation to remove the appendix.

Appendicitis

ah-pen-dih-SY-tis

/əˌpɛndɪˈsaɪtɪs/

A condition in which the appendix becomes inflamed and filled with pus, causing pain.

Apyretic

ay-py-RET-ik

/ˌeɪpaɪˈrɛtɪk/

A term used to describe a person who does not have a fever.

Arachnoid

ah-RAK-noyd

/əˈræknɔɪd/

The middle layer of the three membranes (meninges) that surround the brain and spinal cord.

Arachnoiditis

ah-rak-noyd-EYE-tis

/əˌræknɔɪˈdaɪtɪs/

Inflammation of the arachnoid mater, one of the membranes that surround and protect the nerves of the spinal cord.

Areola

ah-REE-oh-lah

/əˈriːələ/

The small darkened area around the nipple of the breast.

Arrhythmia

ah-RITH-mee-ah

/əˈrɪðmiə/

A condition in which the heart beats with an irregular or abnormal rhythm.

Arteriogram

ar-TEER-ee-oh-gram

/ɑːrˈtɪəriəˌɡræm/

An X-ray of an artery, injected with a radiopaque contrast medium.

Arteriole

ar-TEER-ee-ohl

/ɑːrˈtɪərioʊl/

A small branch of an artery leading into capillaries.

Arteriosclerosis

ar-teer-ee-oh-skleh-ROH-sis

/ɑːrˌtɪərioʊskləˈroʊsɪs/

The thickening and hardening of the walls of the arteries.

Arteritis

ar-ter-EYE-tis

/ˌɑːrtəˈraɪtɪs/

Inflammation of the walls of the arteries, usually as a result of infection or autoimmune response.

Arthralgia

ar-THRAL-jah

/ɑːrˈθrældʒə/

Pain in a joint.

Arthritis

ar-THRY-tis

/ɑːrˈθraɪtɪs/

Inflammation of one or more joints, causing pain and stiffness that can worsen with age.

Arthrocentesis

ar-throh-sen-TEE-sis

/ˌɑːrθroʊsɛnˈtiːsɪs/

Surgical puncture of a joint to switch out fluid.

Arthrodesis

ar-throh-DEE-sis

/ˌɑːrθroʊˈdiːsɪs/

Surgical immobilization of a joint by fusion of the adjacent bones.

Arthrogram

AR-throh-gram

/ˈɑːrθroʊˌɡræm/

A series of images of a joint after injection of a contrast medium.

Arthropathy

ar-THROP-ah-thee

/ɑːrˈθrɒpəθi/

Any disease of the joints.

Arthroplasty

AR-throh-plas-tee

/ˈɑːrθroʊˌplæsti/

The surgical reconstruction or replacement of a joint.

Arthroscope

AR-throh-skohp

/ˈɑːrθrəˌskoʊp/

An instrument through which the interior of a joint may be inspected or operated on.

Articular

ar-TIK-yoo-lar

/ɑːrˈtɪkjʊlər/

Relating to a joint or the joints.

Artifact

AR-tih-fakt

/ˈɑːrtɪˌfækt/

In radiology, a feature that appears in an image that is not present in the original object.

Ascites

ah-SY-teez

/əˈsaɪtiːz/

The accumulation of fluid in the peritoneal cavity, causing abdominal swelling.

Aspermia

ah-SPER-mee-ah

/eɪˈspɜːrmiə/

The complete lack of semen with ejaculation.

Asphyxia

as-FIK-see-ah

/æsˈfɪksiə/

A condition arising when the body is deprived of oxygen, causing unconsciousness or death.

Aspiration

as-pih-RAY-shun

/ˌæspəˈreɪʃən/

The action of drawing fluid or foreign substances into the lungs, or withdrawing fluid with a syringe.

Aspirin

AS-pih-rin

/ˈæsprɪn/

A pharmaceutical drug used to reduce pain, fever, or inflammation.

Assimilation

ah-sim-ih-LAY-shun

/əˌsɪmɪˈleɪʃən/

The absorption and digestion of food or nutrients by the body or any biological system.

Asthenia

as-THEE-nee-ah

/æsˈθiːniə/

Abnormal physical weakness or lack of energy.

Astigmatism

ah-STIG-mah-tizm

/əˈstɪɡməˌtɪzəm/

A defect in the eye or in a lens caused by a deviation from spherical curvature, resulting in distorted images.

Astrocytoma

as-troh-sy-TOH-mah

/ˌæstroʊsaɪˈtoʊmə/

A type of cancer that can form in the brain or spinal cord in cells called astrocytes.

Asymptomatic

ay-simp-toh-MAT-ik

/ˌeɪsɪmptəˈmætɪk/

Producing or showing no symptoms.

Asystole

ay-SIS-toh-lee

/eɪˈsɪstəli/

A state of no electrical activity from the heart; a flatline.

Ataxia

ah-TAK-see-ah

/əˈtæksiə/

The loss of full control of bodily movements.

Atelectasis

at-ee-LEK-tah-sis

/ˌætəˈlɛktəsɪs/

Partial or complete collapse of the lung.

Atherosclerosis

ath-er-oh-skleh-ROH-sis

/ˌæθəroʊskləˈroʊsɪs/

A disease of the arteries characterized by the deposition of plaques of fatty material on their inner walls.

Atopy

AT-oh-pee

/ˈætəpi/

A genetic predisposition to develop allergic diseases such as allergic rhinitis or asthma.

Atresia

ah-TREE-zhah

/əˈtriːʒə/

A condition in which a body orifice or passage in the body is abnormally closed or absent.

Atrium

AY-tree-um

/ˈeɪtriəm/

Each of the two upper cavities of the heart from which blood is passed to the ventricles.

Atrophy

AT-roh-fee

/ˈætrəfi/

Waste away, typically due to the degeneration of cells, or become vestigial during evolution.

Atropine

AT-roh-peen

/ˈætrəˌpiːn/

A medication used to treat certain types of nerve agent and pesticide poisonings as well as some types of slow heart rate.

Audiogram

AW-dee-oh-gram

/ˈɔːdioʊˌɡræm/

A graph showing the results of a pure-tone hearing test.

Audiometry

aw-dee-OM-eh-tree

/ˌɔːdiˈɒmɪtri/

The testing of a person's ability to hear various sound frequencies.

Aura

AW-rah

/ˈɔːrə/

A warning sensation (such as flickering lights) that often precedes a migraine or seizure.

Auricle

AW-rih-kul

/ˈɔːrɪkəl/

The visible part of the ear that resides outside of the head; also known as the pinna.

Auscultation

aws-kul-TAY-shun

/ˌɔːskəlˈteɪʃən/

The action of listening to sounds from the heart, lungs, or other organs, typically with a stethoscope.

Autism

AW-tizm

/ˈɔːtɪzəm/

A neurodevelopmental disorder characterized by challenges with social interaction and repetitive behaviors.

Autograft

AW-toh-graft

/ˈɔːtoʊˌɡræft/

A bone or tissue graft moved from one part of a person's body to another part of the same person's body.

Autoimmune

aw-toh-im-YOON

/ˌɔːtoʊɪˈmjuːn/

Relating to disease caused by antibodies or lymphocytes produced against substances naturally present in the body.

Autologous

aw-TOL-oh-gus

/ɔːˈtɒləɡəs/

Cells or tissues obtained from the same individual who will receive them back.

Autonomic

aw-toh-NOM-ik

/ˌɔːtəˈnɒmɪk/

The part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing.

Autopsy

AW-top-see

/ˈɔːtɒpsi/

A post-mortem examination to discover the cause of death or the extent of disease.

Autosome

AW-toh-sohm

/ˈɔːtəˌsoʊm/

Any chromosome that is not a sex chromosome.

Avitaminosis

ay-vy-tah-mih-NOH-sis

/eɪˌvaɪtəmɪˈnoʊsɪs/

A disease caused by a chronic or long-term vitamin deficiency.

Avulsion

ah-VUL-shun

/əˈvʌlʃən/

The action of pulling or tearing away a body part or tissue.

Axilla

ak-SIL-ah

/ækˈsɪlə/

The space below the shoulder through which vessels and nerves pass; commonly known as the armpit.

Axon

AK-son

/ˈæksɒn/

The long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.

Azoospermia

ay-zoh-oh-SPER-mee-ah

/eɪˌzoʊəˈspɜːrmiə/

A medical condition of a male not having any measurable level of sperm in his semen.

Azoospermia

ay-zoh-oh-SPER-mee-ah

/eɪˌzoʊəˈspɜːrmiə/

Medical condition where a man does not have any measurable level of sperm in his semen.

Azotemia

az-oh-TEE-mee-ah

/ˌæzəˈtiːmiə/

An elevation of blood urea nitrogen (BUN) and serum creatinine levels, indicating kidney dysfunction.

Azotemia

az-oh-TEE-mee-ah

/ˌæzəˈtiːmiə/

An excess of nitrogenous substances in the blood, often due to kidney failure.

Azygos

AZ-ih-gos

/ˈæzɪɡəs/

An unpaired structure, such as the azygos vein which drains the thoracic wall.