noun Date: 1898 the average length of life of a kind of organism or of a material object especially in a particular environment or under specified circumstances, the duration of existence of an individual
LIFE SPAN
Meaning of LIFE SPAN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012