early 15c., from Medieval Latin transpirationem (nominative transpiratio), noun of action from past participle stem of transpirare (see transpire).
Entries linking to transpiration
transpire v.
1590s, "pass off in the form of a vapor or liquid," from French transpirer (16c.), from Latin trans "across, beyond; through" (see trans-) + spirare "to breathe" (see spirit (n.)). Figurative sense of "leak out, become known" is recorded from 1741, and the erroneous meaning "take place, happen" is almost as old, being first recorded 1755. Related: Transpired; transpiring.