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cylinder in geometry, a surface or volume described by a straight line tracing a closed curve, esp. a circle, at a fixed angle, usu. a right angle, in two parallel planes. [5 definitions]
cylinder head of the cylinder in an internal-combustion engine, the closed, often detachable end opposite to that from which the piston or connecting rod projects.
cylindrical of, concerning, or in the shape of a cylinder.
cymbal a concave circular percussion instrument of brass or bronze, played either in pairs that are struck together or singly with drumsticks or brushes.
cymbidium any of various tropical Asiatic orchids that bear showy blossoms, usu. on long stalks.
cyme a flower cluster that blooms from the center to the edges, and whose main stem is always topped by a flower.
Cymric of or concerning the Celtic people of Wales, or their language.
Cymry (used with a pl. verb) a branch of the Celtic peoples, including the Welsh, the Cornish, and the Bretons.
cynic one who believes that selfishness is the basic motivation behind all actions.
cynical showing little or no faith in human nature; distrustful or contemptuous of others' motives. [2 definitions]
cynicism a cynical character, attitude, or quality.
cynosure a thing or person that is the center of attention and admiration.
cypress one of a group of evergreen trees having tiny scale-like leaves, or the branches or wood of such a tree. [2 definitions]
Cyprian see Cypriot.
cyprinoid any of various bony freshwater fishes, such as the carp, sucker, and minnow.
Cypriot a native or citizen of Cyprus, or a descendant thereof. [3 definitions]
cypripedium any of various ground-rooted orchids that have flat leaves and bear flowers having pouchlike lip petals, such as the lady's-slipper. [2 definitions]
Cyprus a Mediterranean island country near the southeastern coast of Turkey.
Cyrillic designating or concerning the alphabet used in Russia, Bulgaria, and other Slavic countries.
-cyst sac; cavity; vesicle; bladder.
cyst a fluid-filled vesicle or sac within body tissue, sometimes a pathological development but most often not. [3 definitions]