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cut the Gordian knot to solve a difficult problem in a rapid, bold manner.
cutthroat a bloodthirsty, merciless, or cruel person, esp. a murderer. [5 definitions]
cutthroat trout a trout found in mountain streams in northwestern North America, having a reddish mark on its throat.
cutting the act of one that cuts. [5 definitions]
cutting board a rectangular board, often made of wood, used esp. for cutting vegetables or meats.
cutting edge the sharp edge of a cutting implement, such as scissors, a knife, or the like, that serves to cut or penetrate something. [2 definitions]
cuttlebone the internal shell of cuttlefish, used as food for pet birds and, in powdered form, for polishing.
cuttlefish any of several mollusks with calcified internal shells and ten tentacles attached to the head.
cutup (informal) someone who habitually tries to be funny or plays pranks.
cutwater the forward edge of a ship's prow. [2 definitions]
cutwork openwork embroidery in which some of the fabric is cut out from the design.
cutworm a caterpillar that feeds by night on a wide variety of plants, characteristically cutting through the plant stems at ground level.
-cy condition; quality. [3 definitions]
cyanamide a caustic, white, unstable compound prepared by the reaction of calcium cyanamide with sulfuric acid and used in chemical production.
cyanate a salt or ester of cyanic acid.
cyanic containing cyanogen. [2 definitions]
cyanic acid a colorless, poisonous, volatile acid with a pronounced odor of almonds.
cyanide a chemical compound that contains one carbon and one nitrogen atom together with another element such as potassium or sodium, both of which form extremely poisonous substances. [2 definitions]
cyanine any of several dyes that are used to sensitize photographic film to certain colors.
cyano- dark blue. [2 definitions]
cyanocobalamin a form of vitamin B12.