MedTerm Speak

Master the language of medicine

Macrophage

MAK-roh-fayj

/ˈmækroʊˌfeɪdʒ/

A large phagocytic cell found in stationary form in the tissues or as a mobile white blood cell, especially at sites of infection.

Mastication

mas-tih-KAY-shun

/ˌmæstɪˈkeɪʃən/

The process by which food is crushed and ground by teeth; chewing.

Mechanoreceptor

mek-uh-noh-ree-SEP-tur

/ˌmɛkənoʊrɪˈsɛptər/

A sense organ or cell that responds to mechanical stimuli such as touch or sound.

Medulla Oblongata

meh-DULL-uh ob-long-GAH-tuh

/məˈdʌlə ˌɒblɒŋˈɡɑːtə/

The lowest part of the brainstem, controlling vital autonomic functions like breathing and heart rate.

Melanin

MEL-uh-nin

/ˈmɛlənɪn/

A dark brown to black pigment occurring in the hair, skin, and iris of the eye in people and animals.

Melatonin

mel-uh-TOH-nin

/ˌmɛləˈtoʊnɪn/

A hormone secreted by the pineal gland that inhibits melanin formation and is thought to be concerned with regulating the reproductive cycle and sleep.

Meninges

meh-NIN-jeez

/mɪˈnɪndʒiːz/

The three membranes (the dura mater, arachnoid, and pia mater) that line the skull and vertebral canal and enclose the brain and spinal cord.

Menstruation

men-stroo-AY-shun

/ˌmɛnstruˈeɪʃən/

The process in a woman of discharging blood and other materials from the lining of the uterus at intervals of about one lunar month.

Metabolism

meh-TAB-uh-liz-um

/məˈtæbəˌlɪzəm/

The chemical processes that occur within a living organism in order to maintain life.

Mitochondria

my-toh-KON-dree-uh

/ˌmaɪtəˈkɒndriə/

An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur.

Mitosis

my-TOH-sis

/maɪˈtoʊsɪs/

A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus.

Monocyte

MON-oh-syt

/ˈmɒnəˌsaɪt/

A large phagocytic white blood cell with a simple oval nucleus and clear, grayish cytoplasm.

Motor Unit

MOH-tur YOO-nit

/ˈmoʊtər ˈjuːnɪt/

A single motor neuron and all the muscle fibers it innervates.

Myocardium

my-oh-KAR-dee-um

/ˌmaɪoʊˈkɑːrdiəm/

The muscular tissue of the heart.

Myofibril

my-oh-FY-bril

/ˌmaɪoʊˈfaɪbrɪl/

Any of the elongated contractile threads found in striated muscle cells.

Myoglobin

my-oh-GLOH-bin

/ˌmaɪəˈɡloʊbɪn/

A red protein containing heme, which carries and stores oxygen in muscle cells.

Myosin

MY-oh-sin

/ˈmaɪəsɪn/

A fibrous protein that forms (with actin) the contractile filaments of muscle cells.