Nouns

(n)emission, emanationthe act of emitting; causing to flow forth
(n)discharge, emissiona substance that is emitted or released
(n)emissionthe release of electrons from parent atoms
(n)discharge, emission, expellingany of several bodily processes by which substances go out of the body“the discharge of pus”
(n)emissionthe occurrence of a flow of water (as from a pipe)