transpiration

noun

tran·​spi·​ra·​tion ˌtran(t)s-pə-ˈrā-shən How to pronounce transpiration (audio)
: 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 adjective

Examples of transpiration in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Calcium movement in the plant is dependent on transpiration, which is the loss of water to the atmosphere from plant leaves, stems, and flowers. Nora Doonan, Hartford Courant, 14 June 2025 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 See All Example Sentences for transpiration

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of transpiration was in the 15th century

Browse Nearby Words

Cite this Entry

“Transpiration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/transpiration. Accessed 18 Jun. 2025.

Kids Definition

transpiration

noun
tran·​spi·​ra·​tion tran(t)s-pə-ˈrā-shən How to pronounce transpiration (audio)
: 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 How to pronounce transpiration (audio)
: the passage of watery vapor from a living body through a membrane or pores
transpirational adjective

More from Merriam-Webster on transpiration

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