per·spi·ra·tion 
(pûr′spə-rāshən)
(pûr′spə-rāshən)n.
1. The fluid, consisting of water with small amounts of urea and salts, that is excreted through the pores of the skin by the sweat glands; sweat.
2. The act or process of perspiring.
per·spira·to′ry (pər-spīrə-tôr′ē, pûrspər-ə-) adj.