transpiration(redirected from transpirational)
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The act or process of transpiring, especially through the stomata of plant tissue or the pores of the skin.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
tran•spi•ra•tion(ˌtræn spəˈreɪ ʃən)
1. an action or instance of transpiring.
2. the passage of water through a plant from the roots through the vascular system to the atmosphere.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
The process of giving off vapor containing water and waste products, especially through the stomata on leaves or the pores of the skin.
Did You Know? Plants need much more water than animals do. But why? Plants use water not only to carry nutrients throughout their tissues, but also to exchange gases with the air in the process known as transpiration. Air, which contains the carbon dioxide that plant cells need for photosynthesis, enters the plant mainly through the stomata (tiny holes under its leaves). The air travels through tiny spaces in the leaf tissue to the cells that conduct photosynthesis. These cells are coated with a thin layer of water. The cell walls do not permit gases to pass through them, but the carbon dioxide can move across the cell walls by dissolving in the water on their surface. The cells remove the carbon dioxide from the water and use the same water to carry out oxygen, the main waste product of photosynthesis. All this mixing of water and air in transpiration, though, has one drawback: more than 90 percent of the water that a plant's roots suck up is lost by evaporation through the stomata. This is why a plant always needs water and why plants that live in dry climates, such as cacti, have reduced leaf surfaces from which less water can escape.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Evaporation of water from leaves.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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|Noun||1.||transpiration - the passage of gases through fine tubes because of differences in pressure or temperature|
|2.||transpiration - the process of giving off or exhaling water vapor through the skin or mucous membranes|
|3.||transpiration - the emission of water vapor from the leaves of plants|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
transpiration[ˌtrænspɪˈreɪʃən] N → transpiración f
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
transpiration[ˌtrænspɪˈreɪʃ/ən] n → traspirazione f
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
n. transpiración, perspiración.
English-Spanish Medical Dictionary © Farlex 2012