Main Entry:

tran·spi·ra·tion

Pronunciation:

\ˌtran(t)s-pə-ˈrā-shən\

Function:

noun

Date:

15th century

: the act or process or an instance of transpiring ; especially : the passage of watery vapor from a living body (as of a plant) through a membrane or pores

— tran·spi·ra·tion·al \-shnəl, -shə-n^əl\ adjective