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Meaning of transpiration

- 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.
- The evaporation of water, or exhalation of aqueous vapor, from cells and masses of tissue.
- The passing of gases through fine tubes, porous substances, or the like; as, transpiration through membranes.