lifespan

Pronunciation:			l'Ifsp`an
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WordNet Dictionary
	Definition:		[n]  the period during which something is functional (as between birth and death); "the battery had a short life"; "he lived a long and happy life"
	Synonyms:		life, lifetime
	See Also:		afterlife, age, birth, death, demise, dying, eld, hereafter, life expectancy, period, period of time, time of life, time period