Main Entry: hy·dro·sphere

Pronunciation: \-ˌsfir\

Function: noun

Etymology: International Scientific Vocabulary

Date: 1887

: the aqueous vapor of the atmosphere; broadly : the aqueous envelope of the earth including bodies of water and aqueous vapor in the atmosphere

— hy·dro·spher·ic \ˌhī-drə-ˈsfir-ik, -ˈsfer-\ adjective