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alternation of two or more different forms in the life cycle of a plant or animal alternation of generations , heterogenesis , xenogenesis
plant that completes its entire life cycle within the space of a year annual
natural family planning in which the fertile period of the woman's menstrual cycle is inferred by noting the rise in basal body temperature that typically occurs with ovulation basal body temperature method , basal body temperature method of family planning
plant having a life cycle that normally takes two seasons from germination to death to complete; flowering biennials usually bloom and fruit in the second season biennial
plants taking two growing seasons to complete life cycle biennial
cycle of human emotion or physical condition biorhythm
fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host blister rust , Cronartium ribicola
natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle) calendar method , calendar method of birth control , rhythm , rhythm method , rhythm method of birth control
complete cycle of events in the heart from the beginning of one heart beat to the beginning of the next; an electrical impulse conducted through the heart muscle that constricts the atria which is followed by constriction of the ventricles cardiac cycle
graphical recording of the cardiac cycle produced by an electrocardiograph cardiogram , ECG , EKG , electrocardiogram
cycle (of expansion and compression) of an idealized reversible heat engine that does work without loss of heat Carnot's ideal cycle , Carnot cycle
differing from true slime molds in being cellular and nucleate throughout the life cycle cellular slime mold
time in a woman's life in which the menstrual cycle ends change of life , climacteric , menopause
class of protozoa having cilia or hairlike appendages on part or all of the surface during some part of the life cycle Ciliata , Ciliophora , class Ciliata , class Ciliophora
twenty-four hour occurrence or cycle circadian
daily cycle of activity observed in many living organisms circadian rhythm
rhythmic activity cycle of 24 hours for many organisms circadian rhythm
coenzyme important in respiration in the Krebs cycle cocarboxylase , thiamine pyrophosphate
concerning a cycle cyclical
(Hinduism and Buddhism) the beatitude that transcends the cycle of reincarnation; characterized by the extinction of desire and suffering and individual consciousness enlightenment , Nirvana
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