[emis.sion] n (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 waves radiated by an antenna or a celestial body (2): substances discharged into the air (as by a smokestack or an automobile gasoline engine) b: effluvium -- emis.sive adj