emission (
http://definr.com/emission)
n 1: the act of emitting [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)