n 1 : a recurring series of events: as a (1) : a series of stages through which an organism tends to pass once in a fixed order <the common of birth, growth, senescence and death -T. C. Schneirla & Gerard Piel> : also : a series of stages through which a population of organisms tends to pass more or less in synchrony <the mosquito-hatching > - see LIFE CYCLE (2) : a series of physiological, biochemical, or psychological stages that recur in the same individual - see CARDIAC CYCLE MENSTRUAL CYCLE KREBS CYCLE b : one complete performance of a vibration, electric oscillation, current alternation, or other periodic process c : a series of ecological stages through which a substance tends to pass and which usu. but not always leads back to the starting point <the of nitrogen in the living world> 2 : RING 2 cy*clic or cy*cli*cal adj cy*cli*cal*ly also cy*clic*ly adv
, vi, cycled cycling : to undergo the estrous cycle <the mare has begun cycling> .
Similar sounding terms: ce·cal sca·la scale scaly
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