| abductor |
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noun
- One who abduct, abducts, a kidnapper.
- (anatomy) A muscle which serves to draw a part out, or form the median line of the body; as, the abductor oculi, which draws the eye outward.
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| accelerator |
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noun Often used adjectivally
- One who, or that which, accelerates.
- A device for causing acceleration.
- A substance which speeds up chemical reactions.
- accelerator pedal.
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| accessory |
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noun (accessories)
- That which belongs to something else deemed the principal; something additional and subordinate, an attachment
- the accessories of a mobile phone
- Quotations
- The aspect and accessories of a den of banditti. - w:Thomas Carlyle
- (context, Clothing) An article that completes one's basic outfit, such as a scarf or gloves.
- (context, Law) One who, not being present, contributes as an assistant or instigator to the commission of an offense.
- accessory before the fact
- accessory after the fact
- (Fine Arts): Anything that enters into a work of art without being indispensably necessary, as mere ornamental parts. - w:James Elmes
adjective
- Having a secondary, supplementary or subordinate function by accompanying as a subordinate; aiding in a secondary way; being additional; being connected as an incident or subordinate to a principal; contributing or being contributory. Said of persons and things, and, when of persons, usually in a bad sense; as, he was accessory to the riot; accessory sounds in music.
- (context, Law) assist, Assisting a crime without actually participating in committing the crime itself.
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| acetabulum |
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noun (plural acetabula or acetabulums)
- (Roman Antiquities): a vinegar cup;
- (Roman Antiquities): the socket of the hipbone;
- (Roman Antiquities): a measure of about one eighth of a pint
- (Anatomy)): The bony cup which receives the head of the thigh bone.
- (Anatomy)): The cavity in which the leg of an insect is inserted at its articulation with the body.
- (Anatomy)): A sucker of the sepia or cuttlefish and related animals.
- (Anatomy)): The large posterior sucker of the leeches.
- (Anatomy)): One of the lobes of the placenta in ruminating animals.
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| Adam's apple |
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noun
- The lump in the throat, more noticeable in males than in females; the laryngeal prominence.
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| adductor |
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noun
- (anatomy) A muscle which draws a limb or part of the body toward the middle line of the body, or closes extended parts of the body; -- opposed to abductor; as, the adductor of the eye, which turns the eye toward the nose.
- Verrill:
- : In the bivalve shells, the muscles which close the values of the shell are called muscles.
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| adenohypophysis |
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noun (plural adenohypophyses)
- (anatomy) the anterior lobe of the pituitary gland, producing and secreting several peptide hormones that regulate many physiological processes including stress, growth, and reproduction.
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| adenoid |
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noun
- (anatomy) One of two folds of lymphatic tissue covered by ciliated epithelium. They are found in the roof and posterior wall of the nasopharynx at the back of the throat behind the uvula. They may obstruct normal breathing and make speech difficult when swollen, a condition often called adenoids.
adjective
- (anatomy) Of or relating to lymphatic glands or lymphoid tissue; lymphoid.
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| adipose |
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noun
- animal fat stored in the tissue of the body
adjective
- of, related to, or composed of fat; fatty
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| adrenal |
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noun
- An adrenal gland.
adjective
- Pertaining to the adrenal glands or their secretions.
- Near the kidneys.
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| adrenal gland |
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noun
- (anatomy) In mammals, either of a pair of complex endocrine glands, situated above each kidney, secreting hormones which control the heart rate, blood pressure, and metabolism.
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| airway |
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noun (plural airways)
- (anatomy) The trachea.
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| alveolus |
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noun (alveoli)
- A small cavity or pit.
- (anatomy) an anatomical structure that has the form of a hollow cavity
- (anatomy) a small air sac in the lungs, where oxygen and carbon dioxide are exchanged with the blood.
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| amnion |
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noun (pl2=amnia)
- (anatomy) the innermost membrane of the fetal membranes of reptiles, birds, and mammals; the sac in which the embryo is suspended.
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| amphiarthrosis |
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noun - (biology) the type of movable joint in animals in which the surfaces of bones are connected by ligaments or cartilage
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| amygdala |
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noun
- (medical) The region of the brain, located in the medial temporal lobe, believed to play a key role in the emotions, such as fear and pleasure, in animals and humans.
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| Anal |
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proper noun
- A language spoken by 14,500 people in India and Myanmar.
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| anastomosis |
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noun
- a cross-connection between two blood-vessels
- an interconnection between any two channels, passages or vessels
- 1922: (...) our grandam, which we are linked up with by successive of navelcords sold us all, seed, breed and generation, for a penny pippin. (Joyce, Ulysses)
- (medicine) the surgical creation of a connecting passage between blood-vessels or other channels
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| anatomical |
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adjective
- Of or relating to anatomy or dissection; as, the anatomic art; anatomical observations.
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| anatomist |
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noun - One who studies, teaches, writes on, or does research on anatomy and anatomical structures.
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| ankle |
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noun
- The joint which connects the foot with the leg; the tarsus.
- (slang) Woman
verb (ankl, ing)
- (slang) To walk.
- (bicycling) To cyclically angle the foot at the ankle while pedaling, to maximize the amount of work applied to the pedal during each revolution.
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| anklebone |
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noun (plural anklebones)
- (anatomy) The talus.
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| ankylosis |
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noun - (anatomy) the growing together of bones to form a single unit
- (medicine) the stiffening of a joint as the result of such abnormal fusion
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| anteorbital |
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adjective ante-orbital
- (Astronautical) Referring to the period before orbit is achieved.
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| anterior |
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adjective
- before, Before in place; earlier in time.
- (anatomy) Nearer the head or the front.
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| antitragus |
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noun
- a projection of the auricle of the ear extending to the tragus
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| antrum |
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noun (antra)
- A cavity, especially having bony walls.
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| anus |
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noun (anuses)
- (anatomy) The lower opening of the digestive tract, through which feces pass.
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| aorta |
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noun (pl=aortas or aortae)
- (anatomy) The great artery which carries the blood from the heart to all parts of the body except the lungs; the main trunk of the arterial system.
- (figurative) The liveliest part of something.
- Tracing their battles, I had many occasions to walk along Second Avenue, the of the Lower East Side, exploring places that were once as vibrant and tumultuous as Midtown Manhattan. http://travel.nytimes.com/2007/01/26/travel/escapes/26yiddish.html?8dpc
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| apophysis |
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noun (apophyses)
- A natural outgrowth, swelling or enlargement, usually of an organism
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| aqueduct |
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noun
- An artificial channel that is constructed to convey water from one location to another.
- A structure carrying water over a river or depression, especially in regards to ancient aqueducts.
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| arbor vitae |
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noun - (idiom) (1811) A man's penis.
- References
- 1811 Dictionary of Vulgar Tongue
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| arborvitae |
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noun
- Any of severl North American or Asian conifers, of the genera Thuja and Thujopsis, grown for timber or ornament
- (anatomy) The white nerve tissue of the cerebellum that has a branching structure
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| area |
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noun
- (geometry) A measure of squared distance.
- A particular geographic region.
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| ARM |
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initialism
- accelerated reply mail: a service of the United States Postal Service
- adjustable rate mortgage
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| armpit |
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noun
- The cavity beneath the junction of the arm and shoulder.
- Somewhere or something considered foul.
- The of America.
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| arterial |
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noun (wikipedia, Arterial road)
- A through road.
adjective
- Of or relating to an artery.
- Of or relating to a route, major.
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| arteriole |
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noun (plural )
- (anatomy) One of the small branches of an artery, especially one that connects with capillary, capillaries.
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| arteriovenous |
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adjective (no (compar) or (superl))
- Refers to the spatial relationship between the primary arteries and the primary veins of the heart.
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| artery |
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noun (arteries)
- The efferent vessels from the heart. Arteries convey blood away from the heart regardless of oxygenation status, see pulmonary artery.
- A major transit corridor.
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| articular |
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adjective
- (anatomy) of, or relating to the joints of the body
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| arytenoid |
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noun - (anatomy) either of a pair of movable cartilages in the larynx that serve as posterior attachment points for the vocal folds; a muscle attached to this cartilage, or a gland located near it
adjective
- of, or relating to this cartilage, muscle or gland
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| Atlas |
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proper noun
- (Greek mythology) : son of Iapetus and Clymene, war leader of the Titans ordered by the god Zeus to support the sky on his shoulders; father to Hesperides, the Hyades, and the Pleiades; king of the legendary Atlantis.
- (Astronomy) a moon of Saturn discovered in 1980 from Voyager photos.
- (Astronomy) a crater in the first quadrant of the moon
- (Warfare, U.S.) Intercontinental ballistic missile
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| atomy |
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noun (plural atomies)
- (archaic) a skeleton
- 1599, William Shakespeare, As You Like It, Act 3, scene v,
- :That eyes, that are the frail'st and softest things / Who shut their coward gates on atomies / Should be call'd tyrants, butchers, murderers!
- 1786, Dr. Smollett, The History and Adventures of an Atom, Harrison and Co., page 5,
- :I was now thrown into a violent perturbation of spirit; for I never could behold an without tear and trembling, even when I knew it was no more than a competition of dry bone.
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| atrioventricular |
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adjective
- of the spatial relationship between the ventricles and the atria of the heart
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| atrium |
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noun (atri, a, pl2=atriums)
- (context, architecture) A square hall lighted from above, into which rooms open at one or more levels.
- (anatomy) A body cavity or chamber, especially an upper chamber of the heart that receives blood from the veins and forces it into a ventricle. An auricle. In higher vertebrates, the right atrium receives blood from the superior vena cava and inferior vena cava, and the left atrium receives blood from the left and right pulmonary veins.
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| Attic |
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proper noun
- An ancient Greek dialect spoken in Attica, Euboea, and the northern coastal regions of the Aegean Sea.
adjective
- Relating to Athenian culture or architecture.
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| auditory |
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adjective
- of, or relating to hearing, or to the sense or organs of hearing
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| aural |
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adjective
- Of or pertaining to the ear.
- Of or pertaining to sound.
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| auricular |
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noun
- The little finger, so called because it can be readily introduced into the ear passage.
adjective
- Of or pertaining to the ear, or to the sense of hearing; as, auricular nerves.
- Told in the ear, i. e., told privately; as, auricular confession to the priest.
- Recognized by the ear; known by the sense of hearing; as, auricular evidence.
- Received by the ear; known by report.
- (anatomy) Pertaining to the auricles of the heart.
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| autonomic nervous system |
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noun
- (neuroanatomy) In humans and other vertebrates, the part of the nervous system that regulates the involuntary activity of the heart, intestines and glands. These activities include digestion, respiration, perspiration, metabolism, and the modulation of blood pressure.
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| AV |
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initialism
- alternative vote.
- anti-virus.
- arteriovenous.
- atrioventricular.
- audiovisual.
- Authorised Version.
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| axilla |
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noun (plural: axillae)
- The armpit, or the cavity beneath the junction of the arm and shoulder.
- The angle or point of divergence between the upper side of a branch, leaf, or petiole, and the stem or branch from which it springs.
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