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transpiration - 6 dictionary results
tran⋅spi⋅ra⋅tion
[tran-spuh-rey-shuh
n] 
–noun
| 1. | an action or instance of transpiring. |
| 2. | Botany. the passage of water through a plant from the roots through the vascular system to the atmosphere. |
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To transpiration
| tran·spi·ra·tion (trān'spə-rā'shən) n. The act or process of transpiring, especially through the stomata of plant tissue or the pores of the skin. tran'spi·ra'tion·al adj. |
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Transpiration
Tran`spi*ra"tion\, n. [F. transpiration.]1. (Physiol.) The act or process of transpiring or excreting in the form of vapor; exhalation, as through the skin or other membranes of the body; as, pulmonary transpiration, or the excretion of aqueous vapor from the lungs. Perspiration is a form of transpiration. --Cudworth. 2. (bot.) The evaporation of water, or exhalation of aqueous vapor, from cells and masses of tissue. 3. (Physics) The passing of gases through fine tubes, porous substances, or the like; as, transpiration through membranes.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : transpiration
Spanish:
transpiración,
German:
der Schweiß,
Japanese:
発汗
Main Entry: tran·spi·ra·tion
Pronunciation: tran(t)s-p&-'rA-sh&n
Function: noun
: the passage of watery vapor from a living bodythrough a membrane or pores —tran·spi·ra·tion·al /-shn&l, -sh&n-&l/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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transpiration tran·spi·ra·tion (trān'spə-rā'shən)
n.
The passage of watery vapor through the skin or through any membrane or pore.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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transpiration (trān'spə-rā'shən) Pronunciation Key
(click for larger image in new window) The process of giving off vapor containing water and waste products, especially through the stomata on leaves or the pores of the skin. Our Living Language : 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® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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