Main Entry: bio·sphere

Pronunciation: \ˈbī-ə-ˌsfir\

Function: noun

Date: 1899

1 : the part of the world in which life can exist
2 : living organisms together with their environment

— bio·spher·ic \ˌbī-ə-ˈsfir-ik, -ˈsfer-, -ˈsfe-rik\ adjective