Emission /(?)/

E·mis·sion

Emission

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.
  2. That which is sent out, issued, or put in circulation at one time; issue; as, the emission was mostly blood.

Phrases & Compounds
Emission theory
the theory of Newton, regarding light as consisting of emitted particles or corpuscles. See Corpuscular theory, under Corpuscular.