emission
n 1: the act of emitting; causing to flow forth [syn: {emanation}]
2: a substance that is emitted or released [syn: {discharge}]
3: the release of electrons from parent atoms
4: any of several bodily processes by which substances go out
of the body; "the discharge of pus" [syn: {discharge}, {expelling}]
5: the occurrence of a flow of water (as from a pipe)
Source: WordNet® 2.0