| achlorhydria | (noun) an abnormal deficiency or absence of free hydrochloric acid in the gastric juice; often associated with severe anemias and cancer of the stomach | - |
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| achlorhydric | (adjective) lacking hydrochloric acid | - |
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| bachelor | (noun) a man who has never been married | Synonyms: unmarried man |
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| (noun) a knight of the lowest order; could display only a pennon | Synonyms: bachelor-at-arms, knight bachelor |
| (verb) lead a bachelor's existence | Synonyms: bach |
| bachelorette | (noun) a young unmarried woman who lives alone | Synonyms: bachelor girl |
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| bachelorhood | (noun) the state of being an unmarried man | - |
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| (noun) the time of a man's life prior to marriage | - |
| bacteriochlorophyll | (noun) a substance in photosensitive bacteria that is related to but different from chlorophyll of higher plants | - |
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| bailor | (noun) the person who delivers personal property (goods or money) in trust to the bailee in a bailment | - |
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| bichloride | (noun) a compound containing two chlorine atoms per molecule | Synonyms: dichloride |
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| bicolor | (adjective) having two colors | Synonyms: bichrome, bicolored, bicolour, bicoloured, dichromatic |
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| bicolored | (adjective) having two colors | Synonyms: bichrome, bicolor, bicolour, bicoloured, dichromatic |
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| caloric | (adjective) relating to or associated with heat | Synonyms: thermal, thermic |
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| (adjective) of or relating to calories in food | - |
| calorie | (noun) unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure | Synonyms: gram calorie, small calorie |
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| calorifacient | (adjective) producing heat; usually used of foods | - |
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| calorific | (adjective) heat-generating | - |
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| calorimeter | (noun) a measuring instrument that determines quantities of heat | - |
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| calorimetric | (adjective) of or relating to the measurement of heat | - |
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| calorimetry | (noun) measurement of quantities of heat | - |
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| calorisator | (noun) an apparatus used in beet-sugar factories to heat the juice in order to aid the diffusion. | Synonyms: calorizator |
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| calorizator | (noun) an apparatus used in beet-sugar factories to heat the juice in order to aid the diffusion. | Synonyms: calorisator |
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| cephaloridine | (noun) a broad spectrum semisynthetic antibiotic produced by modifying cephalosporin | - |
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| chancellor | (noun) the person who is head of government (in several countries) | Synonyms: premier, prime minister |
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| (noun) the honorary or titular head of a university | - |
| chancellorship | (noun) the office of chancellor | - |
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| chlorambucil | (noun) an alkylating agent (trade name Leukeran) used to treat some kinds of cancer | Synonyms: Leukeran |
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| chloramine | (noun) any of several compounds containing chlorine and nitrogen; used as an antiseptic in wounds | Synonyms: chloramine-T |
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| chloramphenicol | (noun) an oral antibiotic (trade name Chloromycetin) used to treat serious infections (especially typhoid fever) | Synonyms: Chloromycetin |
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| chlorate | (noun) any salt of chloric acid | - |
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| chlordiazepoxide | (noun) a tranquilizer (trade names Librium and Libritabs) used in the treatment of alcoholism | Synonyms: Libritabs, Librium |
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| chlorella | (noun) any alga of the genus Chlorella | - |
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| chlorenchyma | (noun) parenchyma whose cells contain chloroplasts | - |
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| chlorhexidine | (noun) a long-lasting liquid antiseptic; used by surgeons to wash their hands before performing surgery | - |
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| chloride | (noun) any compound containing a chlorine atom | - |
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| (noun) any salt of hydrochloric acid (containing the chloride ion) | - |
| chlorinate | (verb) disinfect with chlorine | - |
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| (verb) treat or combine with chlorine | - |
| chlorination | (noun) disinfection of water by the addition of small amounts of chlorine or a chlorine compound | - |
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| (noun) the addition or substitution of chlorine in organic compounds | - |
| chlorine | (noun) a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water) | Synonyms: atomic number 17, Cl |
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| chlorinity | (noun) a measure of the quantity of chlorine or other halides in water (especially seawater) | - |
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| chlorite | (noun) a generally green or black mineral; it occurs as a constituent of many rocks typically in the form of a flat crystal | - |
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| chloroacetophenone | (noun) a tear gas that is weaker than CS gas but lasts longer | Synonyms: CN gas |
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| chlorobenzene | (noun) a colorless volatile flammable liquid with an almond odor that is made from chlorine and benzene; used as a solvent and in the production of phenol and DDT and other organic compounds | - |
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| chlorobenzylidenemalononitrile | (noun) a tear gas that is stronger than CN gas but wears off faster; can be deployed by grenades or cluster bombs; can cause skin burns and fatal pulmonary edema | Synonyms: CS gas |
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| chlorofluorocarbon | (noun) a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans | Synonyms: CFC |
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| chloroform | (noun) a volatile liquid haloform (CHCl3); formerly used as an anesthetic | Synonyms: trichloromethane |
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| (verb) anesthetize with chloroform | - |
| chlorofucin | (noun) the chlorophyll present in brown algae, diatoms, and flagellates | Synonyms: chlorophyll c |
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| chlorophyl | (noun) any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms | Synonyms: chlorophyll |
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| chlorophyll | (noun) any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms | Synonyms: chlorophyl |
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| chlorophyllose | (adjective) relating to or being or containing chlorophyll | Synonyms: chlorophyllous |
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| chlorophyllous | (adjective) relating to or being or containing chlorophyll | Synonyms: chlorophyllose |
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| chlorophyte | (noun) algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water | Synonyms: green algae |
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| chloropicrin | (noun) a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas | Synonyms: nitrochloroform |
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| chloroplast | (noun) plastid containing chlorophyll and other pigments; in plants that carry out photosynthesis | - |
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| chloroplatinate | (noun) any salt of chloroplatinic acid. | - |
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| chloroprene | (noun) derivative of butadiene used in making neoprene by polymerization | - |
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| chloroquine | (noun) an antimalarial drug used to treat malaria and amebic dysentery and systemic lupus erythematosus | - |
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| chlorosis | (noun) iron deficiency anemia in young women; characterized by weakness and menstrual disturbances and a green color to the skin | Synonyms: greensickness |
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| chlorothiazide | (noun) a diuretic drug (trade name Diuril) used in the treatment of edema and hypertension | Synonyms: Diuril |
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| chlorotic | (adjective) of or pertaining to or suffering from chlorosis | Synonyms: greensick |
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| chlorpromazine | (noun) a drug (trade name Thorazine) derived from phenothiazine that has antipsychotic effects and is used as a sedative and tranquilizer | Synonyms: Thorazine |
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| chlorpyrifos | (noun) a common organophosphate insecticide | - |
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| chlortetracycline | (noun) a yellow crystalline antibiotic (trade name Aureomycin) used to treat certain bacterial and rickettsial diseases | Synonyms: Aureomycin |
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| chlorthalidone | (noun) a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks | Synonyms: Hygroton, Thalidone |
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| color | (adjective) having or capable of producing colors | Synonyms: colour |
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| (noun) a visual attribute of things that results from the light they emit or transmit or reflect | Synonyms: coloring, colour, colouring |
| (noun) the appearance of objects (or light sources) described in terms of a person's perception of their hue and lightness (or brightness) and saturation | Synonyms: colour |
| (noun) the timbre of a musical sound | Synonyms: coloration, colour, colouration |
| (noun) interest and variety and intensity | Synonyms: colour, vividness |
| (noun) an outward or token appearance or form that is deliberately misleading | Synonyms: colour, gloss, semblance |
| (noun) (physics) the characteristic of quarks that determines their role in the strong interaction | Synonyms: colour |
| (noun) any material used for its color | Synonyms: coloring material, colour, colouring material |
| (verb) add color to | Synonyms: color in, colorise, colorize, colour, colour in, colourise, colourize |
| (verb) change color, often in an undesired manner | Synonyms: colour, discolor, discolour |
| (verb) affect as in thought or feeling | Synonyms: colour, distort, tinge |
| (verb) give a deceptive explanation or excuse for | Synonyms: colour, gloss |
| (verb) decorate with colors | Synonyms: colour, emblazon |
| (verb) modify or bias | Synonyms: colour |
| coloradillo | (noun) handsome shrub with showy orange to scarlet or crimson flowers; Florida and West Indies to Mexico and Brazil | Synonyms: Hamelia erecta, Hamelia patens, scarlet bush, scarlet hamelia |
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| coloration | (noun) choice and use of colors (as by an artist) | Synonyms: colouration |
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| (noun) appearance with regard to color | Synonyms: colouration |
| (noun) the timbre of a musical sound | Synonyms: color, colour, colouration |
| coloratura | (noun) singing with florid ornamentation | - |
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| (noun) a lyric soprano who specializes in coloratura vocal music | Synonyms: coloratura soprano |
| colorcast | (noun) a television program that is broadcast in color | Synonyms: colourcast |
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| (verb) broadcast in color | - |
| colorectal | (adjective) relating to or affecting the colon and the rectum | - |
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| colored | (adjective) having color or a certain color; sometimes used in combination | Synonyms: colorful, coloured, colourful |
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| (adjective) (used of color) artificially produced; not natural | Synonyms: bleached, coloured, dyed |
| (adjective) having skin rich in melanin pigments; | Synonyms: coloured, negro |
| (adjective) favoring one person or side over another | Synonyms: biased, coloured, one-sided, slanted |
| (noun) a United States term for Blacks that is now considered offensive | Synonyms: colored person, coloured, coloured person |
| colorfast | (adjective) having color that is resistant to fading or running | - |
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| colorful | (adjective) having much or varied color | Synonyms: colourful |
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| (adjective) having color or a certain color; sometimes used in combination | Synonyms: colored, coloured, colourful |
| (adjective) striking in variety and interest | Synonyms: colourful |
| colorimeter | (noun) a measuring instrument used in colorimetric analysis to determine the quantity of a substance from the color it yields with specific reagents | Synonyms: tintometer |
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| colorimetric | (adjective) of or relating to colorimetry | Synonyms: colorimetrical |
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| colorimetrical | (adjective) of or relating to colorimetry | Synonyms: colorimetric |
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| colorimetry | (noun) quantitative chemical analysis by color using a colorimeter | Synonyms: colorimetric analysis |
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| coloring | (noun) the act or process of changing the color of something | Synonyms: colouring |
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| (noun) a visual attribute of things that results from the light they emit or transmit or reflect | Synonyms: color, colour, colouring |
| (noun) a digestible substance used to give color to food | Synonyms: colouring, food color, food coloring, food colour, food colouring |
| colorise | (verb) add color to | Synonyms: color, color in, colorize, colour, colour in, colourise, colourize |
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| colorist | (noun) a painter able to achieve special effects with color | - |
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| colorize | (verb) add color to | Synonyms: color, color in, colorise, colour, colour in, colourise, colourize |
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| colorless | (adjective) weak in color; not colorful | Synonyms: colourless |
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| (adjective) lacking in variety and interest | Synonyms: colourless |
| colorlessness | (noun) the visual property of being without chromatic color | Synonyms: achromaticity, achromatism, colourlessness |
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| colors | (noun) a flag that shows its nationality | Synonyms: colours |
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| (noun) a distinguishing emblem | Synonyms: colours |
| councillor | (noun) a member of a council | Synonyms: council member |
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| councillorship | (noun) the position of council member | Synonyms: councilorship |
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| councilorship | (noun) the position of council member | Synonyms: councillorship |
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| counsellor | (noun) a lawyer who pleads cases in court | Synonyms: advocate, counsel, counselor-at-law, counselor, pleader |
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| (noun) someone who gives advice about problems | Synonyms: counselor |
| (noun) someone who has supervisory duties at a summer camp | Synonyms: counselor |
| counsellorship | (noun) the position of counselor | Synonyms: counselorship |
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| counselor | (noun) a lawyer who pleads cases in court | Synonyms: advocate, counsel, counsellor, counselor-at-law, pleader |
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| (noun) someone who gives advice about problems | Synonyms: counsellor |
| (noun) someone who has supervisory duties at a summer camp | Synonyms: counsellor |
| counselorship | (noun) the position of counselor | Synonyms: counsellorship |
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| cyclorama | (noun) a picture (or series of pictures) representing a continuous scene | Synonyms: diorama, panorama |
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| dechlorinate | (verb) remove chlorine from (water) | - |
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| decolor | (verb) cause to become white or lighter in color | Synonyms: bleach, bleach out, decolorise, decolorize, decolour, decolourise, decolourize, discolorise, discolorize, discolourise |
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| decolorise | (verb) cause to become white or lighter in color | Synonyms: bleach, bleach out, decolor, decolorize, decolour, decolourise, decolourize, discolorise, discolorize, discolourise |
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| decolorize | (verb) cause to become white or lighter in color | Synonyms: bleach, bleach out, decolor, decolorise, decolour, decolourise, decolourize, discolorise, discolorize, discolourise |
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| defloration | (noun) the act of depriving a woman of her virginity (especially by rupturing the hymen through sexual intercourse) | - |
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| (noun) an act that despoils the innocence or beauty of something | - |
| deplorable | (adjective) bad; unfortunate | Synonyms: distressing, lamentable, pitiful, sad, sorry |
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| (adjective) of very poor quality or condition | Synonyms: execrable, miserable, woeful, wretched |
| (adjective) bringing or deserving severe rebuke or censure | Synonyms: condemnable, criminal, reprehensible, vicious |
| deplorably | (adverb) in an unfortunate or deplorable manner | Synonyms: lamentably, sadly, woefully |
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| deplore | (verb) express strong condemnation of | - |
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| (verb) regret strongly | Synonyms: bemoan, bewail, lament |
| dichloride | (noun) a compound containing two chlorine atoms per molecule | Synonyms: bichloride |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| dichloromethane | (noun) a nonflammable liquid used as a solvent and paint remover and refrigerant | Synonyms: methylene chloride |
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| discolor | (verb) change color, often in an undesired manner | Synonyms: color, colour, discolour |
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| (verb) lose color or turn colorless | - |
| (verb) cause to lose or change color | - |
| discoloration | (noun) the act of changing the natural color of something by making it duller or dingier or unnatural or faded | Synonyms: discolouration |
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| (noun) a soiled or discolored appearance | Synonyms: discolouration, stain |