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

Definition of transpiration

: 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

Other Words from transpiration

transpirational \ ˌtran(t)s-​pə-​ˈrā-​shnəl How to pronounce transpiration (audio) , -​shə-​nᵊl \ adjective

Examples of transpiration in a Sentence

Recent Examples on the Web Leaf scorch typically occurs after long periods of dry, windy weather when the roots of a plant are unable to supply water to the foliage at a rate that keeps up with the water lost from the leaves by transpiration., 11 Oct. 2021 It’s the sum of evaporation and transpiration from plants, and it’s driven by warmer global temperatures, which can be attributed to climate change. Los Angeles Times, 25 Sep. 2021 Irrigate longer in hotter weather and during Santa Ana winds to offset water loss due to transpiration. Rita Perwich, San Diego Union-Tribune, 4 Sep. 2021 Plants and trees cool a neighborhood by providing shade, of course, but also by a process called transpiration: as water evaporates from the leaves, its transformation into vapor consumes heat from the atmosphere. New York Times, 20 Aug. 2021 When something interferes with the plant's transpiration process — as in, when the plant doesn't have enough water to release, the plant undergoes heat stress. London Gibson, The Indianapolis Star, 5 Aug. 2021 This stops water loss through transpiration but also prevents the tree from absorbing atmospheric carbon dioxide and using it for photosynthesis. Thayer Walker, Scientific American, 29 Dec. 2016 That process, called transpiration, creates tension within the tree’s water columns. Thayer Walker, Scientific American, 29 Dec. 2016 Groupings also help reduce transpiration and evaporation, which is affected by temperature, humidity, and light levels. Arricca Elin Sansone, House Beautiful, 11 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'transpiration.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of transpiration

15th century, in the meaning defined above

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Time Traveler for transpiration

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

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transpiration ratio

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Last Updated

18 Oct 2021

Cite this Entry

“Transpiration.” Dictionary, Merriam-Webster, Accessed 7 Dec. 2021.

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More Definitions for transpiration


trans·​pi·​ra·​tion | \ ˌtrans-pə-ˈrā-shən How to pronounce transpiration (audio) \

Kids Definition of transpiration

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


tran·​spi·​ra·​tion | \ tran(t)s-pə-ˈrā-shən How to pronounce transpiration (audio) \

Medical Definition of transpiration

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

Other Words from transpiration

transpirational \ -​shnəl, -​shən-​ᵊl How to pronounce transpiration (audio) \ adjective

More from Merriam-Webster on transpiration

Nglish: Translation of transpiration for Spanish Speakers Encyclopedia article about transpiration


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