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From Biology-Online Dictionary | Biology-Online Dictionary
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To emit or evacuate through the pores of the skin; to sweat; to excrete through pores. Firs . . . Perspire a fine balsam of turpentine. (Smollett)

1. (Science: physiology) To excrete matter through the skin; especially, to excrete fluids through the pores of the skin; to sweat.

2. To be evacuated or excreted, or to exude, through the pores of the skin; as, a fluid perspires.

Origin: L. Perspirare to breathe through; per _ spirare. See Per-, and Spirit.