| acetylcholine | (noun) a neurotransmitter that is a derivative of choline; released at the ends of nerve fibers in the somatic and parasympathetic nervous systems | - |
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| acholia | (noun) a condition in which little or no bile is secreted or the flow of bile into the digestive tract is obstructed | Synonyms: cholestasis |
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| anticholinergic | (adjective) inhibiting or blocking the action of acetylcholine at a receptor site | - |
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| (noun) a substance that opposes or blocks the action of acetylcholine | Synonyms: anticholinergic drug |
| anticholinesterase | (noun) a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect | - |
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| catecholamine | (noun) any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland | - |
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| cholangiography | (noun) roentgenographic examination of the bile ducts after a contrast medium has been injected | - |
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| cholangitis | (noun) inflammation of the bile ducts | - |
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| cholecalciferol | (noun) a fat-soluble vitamin that prevents rickets | Synonyms: calciferol, D, ergocalciferol, viosterol, vitamin D |
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| cholecystectomy | (noun) surgical removal of the gall bladder (usually for relief of gallstone pain) | - |
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| cholecystitis | (noun) inflammation of the gall bladder | - |
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| cholecystokinin | (noun) a gastrointestinal hormone that stimulates the secretion of pancreatic enzymes and the contraction and emptying of the gall bladder; its release is stimulated by the presence of fatty acids and amino acids in the small intestine | - |
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| cholelithiasis | (noun) the presence of gallstones in the gallbladder | - |
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| cholelithotomy | (noun) removal of gallstone through an incision in the gallbladder | - |
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| choler | (noun) a humor that was once believed to be secreted by the liver and to cause irritability and anger | Synonyms: yellow bile |
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| (noun) a strong emotion; a feeling that is oriented toward some real or supposed grievance | Synonyms: anger, ire |
| (noun) an irritable petulant feeling | Synonyms: crossness, fretfulness, fussiness, irritability, peevishness, petulance |
| cholera | (noun) an acute intestinal infection caused by ingestion of contaminated water or food | Synonyms: Asiatic cholera, epidemic cholera, Indian cholera |
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| choleraic | (adjective) relating to or resulting from or resembling cholera | - |
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| choleric | (adjective) characterized by anger | Synonyms: irascible |
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| (adjective) quickly aroused to anger | Synonyms: hot-tempered, hotheaded, irascible, quick-tempered, short-tempered |
| (adjective) easily moved to anger | - |
| cholestasis | (noun) a condition in which little or no bile is secreted or the flow of bile into the digestive tract is obstructed | Synonyms: acholia |
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| cholesterin | (noun) an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues | Synonyms: cholesterol |
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| cholesterol | (noun) an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues | Synonyms: cholesterin |
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| choline | (noun) a B-complex vitamin that is a constituent of lecithin; essential in the metabolism of fat | - |
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| cholinergic | (adjective) releasing or activated by acetylcholine or a related compound | - |
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| cholinesterase | (noun) an enzyme that hydrolyses acetylcholine (into choline and acetic acid) | - |
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| cholla | (noun) arborescent cacti having very spiny cylindrical stem segments; southwestern United States and Mexico | Synonyms: Opuntia cholla |
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| conchologist | (noun) a collector and student of mollusc shells | - |
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| conchology | (noun) the collection and study of mollusc shells | Synonyms: shell collecting |
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| echolalia | (noun) (psychiatry) mechanical and meaningless repetition of the words of another person (as in schizophrenia) | - |
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| (noun) an infant's repetition of sounds uttered by others | - |
| echoless | (adjective) having or producing no echo | - |
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| echolike | (adjective) like or characteristic of an echo | Synonyms: echoic |
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| echolocation | (noun) determining the location of something by measuring the time it takes for an echo to return from it | Synonyms: echo sounding |
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| hypercholesteremia | (noun) the presence of an abnormal amount of cholesterol in the cells and plasma of the blood; associated with the risk of atherosclerosis | Synonyms: hypercholesterolemia |
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| hypercholesterolemia | (noun) the presence of an abnormal amount of cholesterol in the cells and plasma of the blood; associated with the risk of atherosclerosis | Synonyms: hypercholesteremia |
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| interscholastic | (adjective) used of competition or cooperation between secondary schools | Synonyms: interschool |
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| melancholia | (noun) extreme depression characterized by tearful sadness and irrational fears | - |
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| melancholiac | (noun) someone subject to melancholia | Synonyms: melancholic |
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| melancholic | (adjective) characterized by or causing or expressing sadness | Synonyms: melancholy |
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| (noun) someone subject to melancholia | Synonyms: melancholiac |
| melancholy | (adjective) grave or even gloomy in character | Synonyms: somber, sombre |
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| (adjective) characterized by or causing or expressing sadness | Synonyms: melancholic |
| (noun) a humor that was once believed to be secreted by the kidneys or spleen and to cause sadness and melancholy | Synonyms: black bile |
| (noun) a feeling of thoughtful sadness | - |
| (noun) a constitutional tendency to be gloomy and depressed | - |
| methacholine | (noun) parasympathomimetic drug (trademark Mecholyl) that stimulates secretions and smooth muscle activity | Synonyms: Mecholyl |
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| neuropsychological | (adjective) of or concerned with neuropsychology | - |
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| neuropsychology | (noun) the branch of psychology that is concerned with the physiological bases of psychological processes | Synonyms: physiological psychology, psychophysiology |
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| onycholysis | (noun) separation of a nail from its normal attachment to the nail bed | - |
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| parapsychological | (adjective) beyond normal physical explanation | - |
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| parapsychologist | (noun) someone who studies the evidence for such psychological phenomena as psychokinesis and telepathy and clairvoyance | - |
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| parapsychology | (noun) phenomena that appear to contradict physical laws and suggest the possibility of causation by mental processes | Synonyms: psychic phenomena, psychic phenomenon |
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| psycholinguist | (noun) a person (usually a psychologist but sometimes a linguist) who studies the psychological basis of human language | - |
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| psycholinguistic | (adjective) of or relating to the psychology of language | - |
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| psycholinguistics | (noun) the branch of cognitive psychology that studies the psychological basis of linguistic competence and performance | - |
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| psychological | (adjective) of or relating to or determined by psychology | - |
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| (adjective) mental or emotional as opposed to physical in nature | - |
| psychologically | (adverb) in terms of psychology | - |
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| (adverb) with regard to psychology | - |
| psychologist | (noun) a scientist trained in psychology | - |
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| psychology | (noun) the science of mental life | Synonyms: psychological science |
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| scholar | (noun) a learned person; someone who by long study has gained mastery in one or more disciplines | Synonyms: bookman, scholarly person |
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| (noun) someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs | Synonyms: assimilator, learner, student |
| (noun) a student who holds a scholarship | - |
| scholarly | (adjective) characteristic of scholars or scholarship | - |
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| scholarship | (noun) profound scholarly knowledge | Synonyms: encyclopaedism, encyclopedism, eruditeness, erudition, learnedness, learning |
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| (noun) financial aid provided to a student on the basis of academic merit | - |
| scholastic | (adjective) of or relating to schools | - |
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| (adjective) of or relating to the philosophical doctrine of scholasticism | - |
| (noun) a person who pays more attention to formal rules and book learning than they merit | Synonyms: bookworm, pedant |
| scholastically | (adverb) with respect to scholastic activities | - |
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| scholasticism | (noun) orthodoxy of a scholastic variety | Synonyms: academicism, academism |
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| scholia | (noun) a marginal note written by a scholiast (a commentator on ancient or classical literature) | Synonyms: scholium |
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| scholiast | (noun) a scholar who writes explanatory notes on an author (especially an ancient commentator on a classical author) | - |
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| scholium | (noun) a marginal note written by a scholiast (a commentator on ancient or classical literature) | Synonyms: scholia |
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| succinylcholine | (noun) a muscle relaxant for striated muscle that is used as an adjunct to anesthesia during certain surgical procedures | - |
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| unscholarly | (adjective) not scholarly | - |
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