2 definitions found
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 1.6 [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
3: the process of secreting perspiration [syn: {perspiring}, {sweating}]
more about transpiration
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