Main Entry: emis·sion

Pronunciation: \ē-ˈmi-shən\

Function: noun

Date: 1607

1 a : an act or instance of emitting : emanation b archaic : publication c : a putting into circulation
2 a : something sent forth by emitting: as (1) : electromagnetic radiation from an antenna or a celestial body (2) usually plural : substances discharged into the air (as by a smokestack or an automobile engine) b : effluvium

— emis·sive \-ˈmi-siv\ adjective