Emission

Part of speech: noun (n.)

1. The act of sending or throwing out; the act of sending forth or putting into circulation; issue; as, the emission of light from the sun; the emission of heat from a fire; the emission of bank notes. issue bank notes.

2. That which is sent out, issued, or put in circulation at one time; issue; as, the emission was mostly blood. Emission theory (Physics), the theory of Newton, regarding light as consisting of emitted particles or corpuscles. See Corpuscular theory, under Corpuscular.