| abysm | (noun) a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively) | Synonyms: abyss |
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| abyss | (noun) a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively) | Synonyms: abysm |
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| acantholysis | (noun) a breakdown of a cell layer in the epidermis (as in pemphigus) | - |
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| adenohypophysis | (noun) the anterior lobe of the pituitary body; primarily glandular in nature | Synonyms: anterior pituitary, anterior pituitary gland |
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| alyssum | (noun) any garden plant of the genus Alyssum having clusters of small yellow or white flowers | Synonyms: madwort |
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| ambystomid | (noun) small to moderate-sized terrestrial or semiaquatic New World salamander | Synonyms: ambystomid salamander |
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| amethyst | (noun) a transparent purple variety of quartz; used as a gemstone | - |
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| amylolysis | (noun) conversion of starch to sugar | - |
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| analysand | (noun) a person undergoing psychoanalysis | - |
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| analyser | (noun) an instrument that performs analyses | Synonyms: analyzer |
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| analysis | (noun) an investigation of the component parts of a whole and their relations in making up the whole | - |
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| (noun) a set of techniques for exploring underlying motives and a method of treating various mental disorders; based on the theories of Sigmund Freud | Synonyms: depth psychology, psychoanalysis |
| (noun) the abstract separation of a whole into its constituent parts in order to study the parts and their relations | Synonyms: analytic thinking |
| (noun) a branch of mathematics involving calculus and the theory of limits; sequences and series and integration and differentiation | - |
| (noun) a form of literary criticism in which the structure of a piece of writing is analyzed | - |
| (noun) the use of closed-class words instead of inflections: e.g., `the father of the bride' instead of `the bride's father' | - |
| analyst | (noun) someone who is skilled at analyzing data | - |
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| (noun) a licensed practitioner of psychoanalysis | Synonyms: psychoanalyst |
| (noun) an expert who studies financial data (on credit or securities or sales or financial patterns etc.) and recommends appropriate business actions | - |
| aneurysm | (noun) a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall | Synonyms: aneurism |
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| anticatalyst | (noun) (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst | - |
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| apophysis | (noun) (anatomy) a natural outgrowth or projection on an organ or body part such as the process of a vertebra | - |
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| (noun) (botany) a natural swelling or enlargement: at the base of the stalk or seta in certain mosses or on the cone scale of certain conifers | - |
| astrophysicist | (noun) an astronomer who studies the physical properties of celestial bodies | - |
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| astrophysics | (noun) the branch of astronomy concerned with the physical and chemical properties of celestial bodies | - |
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| asystole | (noun) absence of systole; failure of the ventricles of the heart to contract (usually caused by ventricular fibrillation) with consequent absence of the heart beat leading to oxygen lack and eventually to death | Synonyms: cardiac arrest, cardiopulmonary arrest |
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| attorneyship | (noun) the position of attorney | - |
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| autocatalysis | (noun) catalysis in which the catalyst is one of the products of the reaction | - |
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| autolysis | (noun) lysis of plant or animal tissue by an internal process | Synonyms: self-digestion |
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| automysophobia | (noun) a morbid fear of being dirty | - |
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| babysitter | (noun) a person engaged to care for children when the parents are not home | Synonyms: baby-sitter, sitter |
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| babysitting | (noun) the work of a baby sitter; caring for children when their parents are not home | Synonyms: baby sitting |
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| bacteriolysis | (noun) dissolution or destruction of bacteria | - |
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| bathyscape | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscaph, bathyscaphe |
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| bathyscaph | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscape, bathyscaphe |
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| bathyscaphe | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscape, bathyscaph |
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| bathysphere | (noun) spherical deep diving apparatus (lowered by a cable) for underwater exploration | - |
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| bialystoker | (noun) flat crusty-bottomed onion roll | Synonyms: bialy |
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| billystick | (noun) a short stout club used primarily by policemen | Synonyms: baton, billy, billy club, nightstick, truncheon |
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| biocatalyst | (noun) a biochemical catalyst such as an enzyme | - |
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| biophysicist | (noun) a physicist who applies the methods of physics to biology | - |
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| biophysics | (noun) physics as applied to biological problems | - |
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| biosystematics | (noun) use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework | Synonyms: biosystematy |
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| biosystematy | (noun) use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework | Synonyms: biosystematics |
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| blastocyst | (noun) the blastula of a placental mammal in which some differentiation of cells has occurred | Synonyms: blastodermic vessicle |
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| bobbysock | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysocks |
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| bobbysocks | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysock |
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| bobbysoxer | (noun) an adolescent girl wearing bobby socks (common in the 1940s) | Synonyms: bobby-socker |
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| bootboys | (noun) a youth subculture that appeared first in England in the late 1960s as a working-class reaction to the hippies; hair was cropped close to the scalp; wore work-shirts and short jeans (supported by suspenders) and heavy red boots; involved in attacks against Asians and football hooliganism | Synonyms: skinheads |
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| boysenberry | (noun) large raspberry-flavored fruit; cross between blackberries and raspberries | - |
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| (noun) cultivated hybrid bramble of California having large dark wine-red fruit with a flavor resembling raspberries | Synonyms: boysenberry bush |
| brandysnap | (noun) a gingersnap flavored with brandy | - |
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| breathalyser | (noun) a device that measures chemicals (especially the alcohol content) in a person's expired breath | Synonyms: breathalyzer |
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| byssus | (noun) tuft of strong filaments by which e.g. a mussel makes itself fast to a fixed surface | Synonyms: beard |
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| bystander | (noun) a nonparticipant spectator | - |
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| cataclysm | (noun) an event resulting in great loss and misfortune | Synonyms: calamity, catastrophe, disaster, tragedy |
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| (noun) a sudden violent change in the earth's surface | Synonyms: catastrophe |
| catalysis | (noun) acceleration of a chemical reaction induced by the presence of material that is chemically unchanged at the end of the reaction | Synonyms: contact action |
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| catalyst | (noun) something that causes an important event to happen | - |
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| (noun) (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected | Synonyms: accelerator |
| cherrystone | (noun) a half-grown quahog | Synonyms: cherrystone clam |
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| (noun) small quahog larger than a littleneck; eaten raw or cooked as in e.g. clams casino | Synonyms: cherrystone clam |
| chimneystack | (noun) the part of the chimney that is above the roof; usually has several flues | - |
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| chimneysweep | (noun) someone who cleans soot from chimneys | Synonyms: chimneysweeper, sweep |
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| chimneysweeper | (noun) someone who cleans soot from chimneys | Synonyms: chimneysweep, sweep |
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| chlamys | (noun) a short mantle or cape fastened at the shoulder; worn by men in ancient Greece | - |
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| (noun) collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils | Synonyms: floral envelope, perianth, perigone, perigonium |
| 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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| chondrodystrophy | (noun) an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism | Synonyms: achondroplasia, achondroplasty, osteosclerosis congenita |
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| chrysalis | (noun) pupa of a moth or butterfly enclosed in a cocoon | - |
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| chrysanthemum | (noun) any of numerous perennial Old World herbs having showy brightly colored flower heads of the genera Chrysanthemum, Argyranthemum, Dendranthema, Tanacetum; widely cultivated | - |
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| (noun) the flower of a chrysanthemum plant | - |
| chrysarobin | (noun) a bitter yellow powder used to treat skin diseases | Synonyms: araroba, Goa powder |
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| chrysoberyl | (noun) a rare hard yellow green mineral consisting of beryllium aluminate in crystal form; used as a gemstone | - |
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| chrysolite | (noun) a brown or yellow-green olivine found in igneous and metamorphic rocks and used as a gemstone | - |
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| chrysomelid | (noun) brightly colored beetle that feeds on plant leaves; larvae infest roots and stems | Synonyms: leaf beetle |
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| chrysopid | (noun) pale green unpleasant-smelling lacewing fly having carnivorous larvae | Synonyms: green lacewing, stink fly |
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| chrysoprase | (noun) a green variety of chalcedony valued as a gemstone | - |
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| chrysotherapy | (noun) the use of chemicals containing gold for treating diseases (such as rheumatoid arthritis) | - |
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| chrysotile | (noun) a grey or green fibrous mineral; an important source of commercial asbestos | - |
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| cityscape | (noun) painting depicting a city or urban area | - |
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| (noun) a viewpoint toward a city or other heavily populated area | - |
| claystone | (noun) fine-grained rock consisting of compacted clay particles | - |
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| clyster | (noun) an injection of a liquid through the anus to stimulate evacuation; sometimes used for diagnostic purposes | Synonyms: enema |
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| coelophysis | (noun) one of the oldest known dinosaurs; late Triassic; cannibalistic | - |
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| colpocystitis | (noun) inflammation of the vagina and bladder | - |
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| colpocystocele | (noun) hernia in which the urinary bladder protrudes through the wall of the vagina; sometimes occurs after childbirth | Synonyms: cystocele |
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| corduroys | (noun) cotton trousers made of corduroy cloth | Synonyms: cords |
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| countryseat | (noun) an estate in the country | - |
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| countryside | (noun) rural regions | - |
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| cryptanalysis | (noun) the science of analyzing and deciphering codes and ciphers and cryptograms | Synonyms: cryptanalytics, cryptography, cryptology |
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| cryptanalyst | (noun) decoder skilled in the analysis of codes and cryptograms | Synonyms: cryptographer, cryptologist |
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| crystal | (noun) a protective cover that protects the face of a watch | Synonyms: watch crystal, watch glass |
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| (noun) glassware made of quartz | - |
| (noun) a crystalline element used as a component in various electronic devices | - |
| (noun) a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces | Synonyms: crystallization |
| (noun) a solid formed by the solidification of a chemical and having a highly regular atomic structure | - |
| (noun) colorless glass made of almost pure silica | Synonyms: lechatelierite, quartz, quartz glass, vitreous silica |
| crystallinity | (noun) (chemistry) The degree of structural order in a solid. | - |
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| crystallisation | (noun) the formation of crystals | Synonyms: crystallization, crystallizing |
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| crystallite | (noun) any of numerous minute rudimentary crystalline bodies of unknown composition found in glassy igneous rock | - |
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| crystallization | (noun) a mental synthesis that becomes fixed or concrete by a process resembling crystal formation | - |
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| (noun) a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces | Synonyms: crystal |
| (noun) the formation of crystals | Synonyms: crystallisation, crystallizing |
| crystallizing | (noun) the formation of crystals | Synonyms: crystallisation, crystallization |
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| crystallogen | (noun) any chemical element that belongs to the carbon group. | Synonyms: carbon group element, Group 14 element, tetragen, tetrel |
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| crystallographer | (noun) a specialist in crystallography | - |
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| crystallography | (noun) the branch of science that studies the formation and structure of crystals | - |
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| cyst | (noun) a small anatomically normal sac or bladderlike structure (especially one containing fluid) | Synonyms: vesicle |
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| (noun) a closed sac that develops abnormally in some body structure | - |
| cysteine | (noun) an amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine | - |
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| cystine | (noun) a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones | - |
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| cystitis | (noun) inflammation of the urinary bladder and ureters | - |
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| cystocele | (noun) hernia in which the urinary bladder protrudes through the wall of the vagina; sometimes occurs after childbirth | Synonyms: colpocystocele |
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| cystolith | (noun) a calculus formed in the bladder | Synonyms: bladder stone |
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| cystoparalysis | (noun) paralysis of the urinary bladder | Synonyms: cystoplegia |
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| cystoplegia | (noun) paralysis of the urinary bladder | Synonyms: cystoparalysis |
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| cytolysin | (noun) a substance that partly or completely destroys animal cells | - |
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| cytolysis | (noun) pathological breakdown of cells by the destruction of their outer membrane | - |
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| dacryocyst | (noun) either of the two dilated ends of the lacrimal ducts at the nasal ends of the eyes that fill with tears secreted by the lacrimal glands | Synonyms: lacrimal sac, tear sac |
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| dacryocystitis | (noun) inflammation of the lacrimal sac causing obstruction of the tube draining tears into the nose | - |
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