life' cy"cle

1. Biol.the continuous sequence of changes undergone by an organism from one primary form, as a gamete, to the development of the same form again.
2. a series of stages, as childhood and middle age, that characterize the course of existence of an individual, group, or culture.
3. any similar series of stages: the life cycle of a manufactured product.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

life-carelife expectancy
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