Transpiration
Pronunciation : Tran`spi*ra"tion
Part of Speech : n.
Etymology : [F. transpiration.]
Definition : 1. (Physiol.)
Defn: 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.)
Defn: The evaporation of water, or exhalation of aqueous vapor, from cells and masses of tissue.
3. (Physics)
Defn: The passing of gases through fine tubes, porous substances, or the like; as, transpiration through membranes.
Source : Webster's Unabridged Dictionary, 1913