Dictionary

life span

noun

: the amount of time that a person or animal actually lives

Full Definition of LIFE SPAN

1
:  the average length of life of a kind of organism or of a material object especially in a particular environment or under specified circumstances
2
:  the duration of existence of an individual
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First Known Use of LIFE SPAN

1898
Medical Dictionary

life span

noun \ˈlīf-ˌspan\

Medical Definition of LIFE SPAN

1
:  the duration of existence of an individual
2
:  the average length of life of a kind of organism or of a material object especially in a particular environment or under specified circumstances

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