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emission

e·mis·sion [ i mísh'n ] (plural e·mis·sions)


noun 
Definition:
 
1. letting something out: the act or process of letting something out or giving something out
the emission of radiation

2. something given out: something that is produced or given out
harmful exhaust emissions

3. physics released energy: energy released from a source, usually in the form of electromagnetic radiation

4. physiology something released from body: a bodily discharge, especially of semen

[15th century. < Latin emission-< emiss-, past participle of emittere (see emit)]
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