transpiration

noun

tran·​spi·​ra·​tion ˌtran(t)s-pə-ˈrā-shən 

: 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

transpirational

ˌtran(t)s-pə-ˈrā-sh(ə-)nəl 

adjective

Examples of transpiration in a Sentence

Recent Examples on the Web

The air gets naturally cooled through active transpiration happening in all the leaves. —Markis Hill, Kansas City Star, 13 May 2025

Experts are testing transpiration cooling for spacecraft. —Eileen Falkenberg-Hull, MSNBC Newsweek, 1 May 2025

Additionally, based on recent transpirations at the White House, BetOnline has identified some odds movements in certain markets surrounding NATO, Bitcoin and Voldomyr Zelenskyy. —Jay Ginsbach, Forbes, 4 Mar. 2025

A number of Kane County departments would also be impacted by any cuts to federal funding, including departments in charge of health, water resources and transpiration, among others, according to Kane County Board Chair Corinne Pierog. —R. Christian Smith, Chicago Tribune, 4 Feb. 2025

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for transpiration

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

transpiration

noun

tran·​spi·​ra·​tion tran(t)s-pə-ˈrā-shən 

: the process by which plants give off water vapor through the stomata in their leaves

Medical Definition

transpiration

noun

tran·​spi·​ra·​tion tran(t)s-pə-ˈrā-shən 

: the passage of watery vapor from a living body through a membrane or pores

transpirational

-shnəl, -shən-ᵊl 

adjective