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chloramphenicol an antibiotic drug that is synthesized or derived from a soil bacterium and used in treating various bacterial and some viral afflictions.
chlorate in chemistry, a salt of chloric acid.
chlordane a colorless, toxic liquid hydrocarbon used as an insecticide.
chlorella any of various fresh-water, single-celled green algae.
chloric containing chlorine in the pentavalent state.
chloride in chemistry, a salt of hydrochloric acid consisting of chlorine and one other element.
chloride of lime a white powder made from chlorine and slaked lime and used as a bleaching or disinfecting agent; chlorinated lime.
chlorinate to combine or treat with chlorine. [2 definitions]
chlorine a chemical element of the halogen group that has seventeen protons in each nucleus, occurs naturally only in compounds such as sodium chloride and chloroform, and can be isolated in pure form as a toxic yellow-green gas. (symbol: Cl) [2 definitions]
chlorite1 a green silicate mineral that occurs in platelike crystals.
chlorite2 any of various salts of chlorous acid.
chlorobenzene a colorless flammable liquid widely used in solvents and in organic synthesizing.
chloroform a clear, heavy, volatile liquid used as an anesthetic and a solvent. [3 definitions]
chlorophyll the green pigment in the leaves and stems of plants that is necessary for the production of plant food by photosynthesis.
chloroplast a small oval green bit of protoplasm that contains chlorophyll and is the location of photosynthesis.
chlorosis an abnormal yellowing or color loss in green plant tissue because of insufficient light or nutrition, genetic disorder, or disease that results in deficient chlorophyll production. [2 definitions]
chlorous of or containing trivalent chlorine.
chlorpromazine a drug used to treat nervous upset, nausea, and certain mental disorders.
chlortetracycline a yellow antibiotic powder, obtained from a soil bacterium and used to treat certain infections.
chock a wedge or block placed under an object to prevent it from moving. [3 definitions]
chock-a-block of a ship's hoisting tackle, drawn close together so that the blocks are touching. [2 definitions]