Hypertext Webster Gateway: "transpiration"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
From WordNet (r) 1.7 (wn)
transpiration
n 1: the passage of gases through fine tubes because of
differences in pressure or temperature
2: the emission of water vapor from the leaves of plants
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