lifespan lifespan /ˈlaɪfˌspæn/

noun

1. The period during which something is functional (as between birth and death)  ( life-time , lifespan , lifetime , life )
   the period during which something is functional (as between birth and death)
    The battery had a short life
   the battery had a short life
    He lived a long and happy life
   he lived a long and happy life