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

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Other Words from transpiration

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

Examples of transpiration in a Sentence

Recent Examples on the Web

Through a process called transpiration, plants release water vapor from pores along the underside of their leaves. Jennifer Leman, Popular Mechanics, "4 Reasons Why We Need the Amazon Rainforest," 4 Sep. 2019 This shuts down transpiration and the gaseous exchanges needed for photosynthesis, in which the tree takes in carbon dioxide and releases water and oxygen. Adrian Higgins, Washington Post, "Trees can’t escape the extreme heat. But they do have some clever coping mechanisms.," 20 July 2019 Plants release water into the atmosphere through a process called transpiration. Christina Nunez, National Geographic, "Rainforests, explained," 15 May 2019 Nizer serves on a number of national transpiration boards, including American Association of Motor Vehicle Administrators Region 1 board, the release said. Jessica Anderson,, "What we know about Christine Nizer, head of Maryland's MVA, which failed to forward key voter information," 26 June 2018 These pores also release water via transpiration, which circulates nutrients through the plant and helps cool it by evaporation. Yasemin Saplakoglu, Scientific American, "Trees Sweat to Keep Cool," 12 Apr. 2018 But exceptionally high temperatures are known to greatly reduce photosynthesis—and most existing plant models suggest this should also decrease transpiration, leaving trees in danger of fatally overheating. Yasemin Saplakoglu, Scientific American, "Trees Sweat to Keep Cool," 12 Apr. 2018 Houseplants release moisture into the air through transpiration, so dry skin and nasal passages are less of a winter weather issue, the magazine asserts. Amy Dewall Dadmun, Milwaukee Journal Sentinel, "Green house effect: Plants enhance life in tiny homes, apartments," 26 Jan. 2018 The program is offered free of charge, but families are responsible for students’ transpiration to and from Roseville. Cathy Locke, sacbee, "High school juniors invited to apply for FBI Teen Academy in Roseville | The Sacramento Bee," 14 Feb. 2018

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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Statistics for transpiration

Last Updated

14 Sep 2019

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Time Traveler for transpiration

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

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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 transpirational (audio) \ adjective

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More from Merriam-Webster on transpiration

Rhyming Dictionary: Words that rhyme with transpiration

Spanish Central: Translation of transpiration

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

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