All Words Glossary

Glossary of Anatomy Terms
beginning with letter M
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macrocephalic
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adjective
  1. having an abnormally large head
Maidenhead
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proper noun
  1. a town in Berkshire, England
malleus
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noun (plural mallei)
  1. (anatomy) The small hammer-shaped bone of the middle ear.
mamma
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noun (mammae)
  1. (anatomy) The milk-secreting organ of female humans and other mammals which includes the mammary gland and the nipple or teat; a breast; an udder.
  2. Another term for mama or mother.
mammary
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noun (plural mammaries)
  1. A breast (of a woman or a female animal)
adjective (no comparative or superlative)
  1. (biology) Of or relating to a breast or breasts (of a woman or a female animal).
mammary arteries and veins
mammary gland
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noun (plural mammary glands)
  1. (anatomy) A gland that secretes milk for suckle, suckling an infant or offspring.
mandible
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noun
  1. The lower jaw, especially the lower jawbone.
  2. One of a pair of mouthparts of an arthropod designed for holding food.
manus
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noun (manus)
  1. (obsolete) A hand, as the part of the fore limb below the forearm in a man, or the corresponding part in other vertebrates.
  2. (obsolete, Roman law) The power over other people, esp. that of a man over his wife.
marrow
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noun
  1. (uncountable) The substance inside bones which produces blood cells.
    1. (countable) A kind of vegetable like a large courgette/zucchini or squash.
    • 1847 Sir Robert Schomburgh, Steam-Boat Voyage to Barbados, Bentley's Miscellany, Vol XXII, London: Richard Bentley, page 37.
    • : The finest European vegetables, cabbages, cauliflowers, potatoes, vegetable , were lying in the market-hall, awaiting purchasers.
masseter
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noun
  1. (Anatomy): The large muscle which raises the under jaw, and assists in mastication.
mastoid
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noun
  1. (anatomy) The mastoid process.
adjective
  1. Of or relating to the mastoid process.
  2. Shaped like a breast or nipple.
mastoid process
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noun
  1. The conical, nipple-like projection of the petrous part of the temporal bone, that is situated behind the ear in humans and many other vertebrates, and serves as a site of muscle attachment.
matrix
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noun (matrices)
  1. (obsolete) The womb. The concept of an enclosure is common to many of the other uses of .
  2. (biology) The material or tissue in which more specialized structures are embedded.
  3. (biology) An extracellular matrix, the material or tissue between the cells of animals or plants.
  4. (biology) Part of the mitochondrion.
  5. (biology) The medium in which bacterium, bacteria are cultured.
  6. (mathematics) A rectangular arrangement of numbers or terms having various uses such as transforming coordinates in geometry, solving system of linear equations, systems of linear equations in linear algebra and representing graphs in graph theory.
  7. (computing) A two-dimensional array.
  8. A table of data.
  9. (geology) A geological matrix, the outer material of a rock consisting of larger grains embedded in a material consisting of smaller ones.
  10. (archaeology) The sediment surrounding and including the artifacts, features, and other materials at a site.
  11. (analytical chemistry) The environment from which a given sample is taken.
maxilla
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noun (plural maxillae or maxillas)
  1. Either of the two bones that together form the upper jaw.
meatus
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noun (plural: or meatuses)
  1. (anatomy) an opening or passage in the body
mechanoreceptor
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noun
  1. (biology) any receptor that provides an organism with information about mechanical changes in its environment, such as movement, tension and pressure
media
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noun (plural: mediae)
  1. (anatomy) the middle layer of the wall of a blood vessel or lymph vessel which is composed of connective and muscular tissue. (tunica media, between the tunica interna and tunica externa).
mediad
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adjective
  1. Toward the middle line.
mediastinum
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noun (mediastin, a)
  1. (anatomy) The region in mammals between the pleural sacs, containing the heart and all of the thoracic viscera except the lungs.
member
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noun
  1. One who officially belongs to a group.
  2. A limb.
  3. The penis.
  4. (logic) One of the propositions making up a syllogism.
  5. (settheory) An element of a set.
membrane
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noun (plural: membranes)
  1. A flexible enclosing or separating tissue forming a plane or film and separating two environments (usually in a plant or animal).
  1. A mechanical membrane, a thin, flat flexible part that can deform or vibrate when excited by an external force.
meninges
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noun (plural of meninx)
  1. (anatomy) The three membranes that envelop the brain and spinal cord.
meniscus
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noun (es, pl2=menisci)
  1. the curved surface of liquids in tubes, whether concave or convex, caused by the surface tension of the liquid
  2. a crescent or a body shaped like a crescent
  3. either of two parts of the human knee that provide structural integrity to the knee when it undergoes tension and torsion
mesencephalon
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noun
  1. Composed of the tectum (dorsal portion) and the tegmentum (ventral portion), this part of the brain is located rostral to the pons and caudal to the thalamus and the basal ganglia.
mesoappendix
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noun (pl=mesoappendixes, pl2=mesoappendices)
  1. (anatomy) Part of the mesentery found near the appendix and the terminal ileum.
metacarpal
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noun
  1. Any of the bones of the metacarpus.
adjective
  1. Of the metacarpus.
metacarpus
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noun (pl=metacarpi)
  1. (anatomy) The five bones that form intermediate part of the hand between the fingers and the wrist.
metatarsal
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noun
  1. Any of the bones of the metatarsus.
adjective
  1. Of the metatarsus.
metatarsus
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noun (plural metatarsi)
  1. The five bones that form the intermediate part of the foot between the toes and the ankle.
midbrain
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noun
  1. Composed of the tectum (dorsal portion) and the tegmentum (ventral portion), this part of the brain is located rostral to the pons and caudal to the thalamus and the basal ganglia.
middle finger
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noun
  1. The finger between the forefinger and the ring finger. This is the longest finger.
midriff
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noun
  1. The mid section of the human torso, from below the chest to above the waist
mons pubis
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noun
  1. a fleshy protuberance over the pubic bones that becomes covered with hair during puberty
mons veneris
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noun
  1. The female mons pubis
mouth
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noun
  1. (anatomy) The opening of a creature through which food is ingested.
"Open your and say 'aah'," directed the doctor.
  1. The end of a river out of which water flows.
  2. An outlet, aperture or orifice.
The of a cave
  1. (slang) A loud or overly talkative person.
My kid sister is a real ; she never shuts up.
verb
  1. (transitive) To speak about something.
He mouthed his opinions on the subject at the meeting.
  1. (transitive) To make the actions of speech, without producing sound.
The prompter mouthed the words to the actor, who had forgotten them.
  1. (transitive) To pick up or handle with the lips or mouth, but not chew or swallow.
The fish mouthed the lure, but didn't bite.
mucosa
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noun (plural mucosae or mucosas)
  1. (anatomy) A mucous membrane.
mucous membrane
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noun (plural: mucous membranes)
  1. (anatomy) A membrane which secretes mucus. It forms the lining of various body passages that communicate with the air, such as the respiratory, genitourinary, and alimentary tracts including the mouth, nasal passages, vagina and urethra.
muscle
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noun
  1. (uncountable) A contractile form of tissue which animals use to effect movement.
Muscle consists largely of actin and myosin filaments.
  1. (countable) An organ composed of muscle tissue.
The muscles in his legs strained under the load.
  1. (context, uncountable, figurative) Strength.
It took a lot of to move the boulders.
  1. (uncountable) Hired strongman, strongmen or bodyguards.
    • 1985 " w:Lance Parkin, Lance Parkin, The Infinity Doctors, p 34
    • :It was easy enough to dodge him, let him crash into the floorboards. Peltroc knew that his priority was the leader, not the hired .
verb (muscl, ing)
  1. To use force to make progress.
musculature
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noun
  1. The collection of all muscles in a single body or in a single organ
  2. The structural configuration of muscle in a body or organ
myocardium
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noun (myocardia)
  1. (context, anatomy, cardiology) The muscles that surround and power the heart; blood is supplied by the coronary arteries.

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