"emission" in the noun sense
1. emission, emanation
the act of emitting causing to flow forth
2. discharge, emission
a substance that is emitted or released
3. emission
the release of electrons from parent atoms
4. discharge, emission, expelling
any of several bodily processes by which substances go out of the body
"the discharge of pus"
5. emission
the occurrence of a flow of water (as from a pipe)
Source: WordNet® (An amazing lexical database of English)
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