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cyano- dark blue. [2 definitions]
cyanocobalamin a form of vitamin B12.
cyanogen a poisonous organic gas of carbon and nitrogen that is used for chemical warfare, as a rocket propellant, and in organic synthesis.
cyanosis the medical condition of bluish skin caused by lack of oxygen in the blood.
cyber- of, pertaining to, made by, or existing only on computers.
cybernation the use of computers to control and operate equipment, as in manufacturing.
cybernetics (used with a sing. verb) the science concerned with biological control and communication processes and their imitation by mechanical and electronic devices.
cyberspace the electronic medium of globally networked computers, esp. when conceived of as a three-dimensional space where online communication and transactions take place.
cycad a tropical evergreen plant resembling a palm, but having fernlike leaves.
cyclamate any of several noncaloric artificial sweeteners.
cyclamen any of various plants of the primrose family that bear brightly colored flowers and heart-shaped leaves.
cycle a circle of events that repeats in a regular pattern. [7 definitions]
cyclic pertaining to, forming, or recurring in a cycle. [2 definitions]
cyclical pertaining to, forming, or recurring in a cycle. [3 definitions]
cycling the activity or competitive sport of riding or racing on a bicycle. [2 definitions]
cyclist one who rides a bicycle, motorcycle, or the like.
cyclizine an antihistamine used to combat nausea and motion sickness.
cyclo- cycle; circle; ring. [2 definitions]
cycloid circular. [3 definitions]
cyclometer an instrument used to measure segments of circles. [2 definitions]
cyclone a large system of winds that rotates around a center of low barometric pressure, moving counterclockwise in the Northern Hemisphere and clockwise in the Southern, and usu. producing destructive storms. (Cf. anticyclone.) [2 definitions]