noun

(1) The passage of gases through fine tubes because of differences in pressure or temperature,the process of givng off or exhaling water vapor through the skin or mucous membranes,the emission of water vapor from the leaves of plants

(2) The passage of gases through fine tubes because of differences in pressure or temperature

(3) The process of givng off or exhaling water vapor through the skin or mucous membranes

(4) The emission of water vapor from the leaves of plants