Something which is emitted or sent out; issue. / The act of emitting; the act of sending forth or putting into circulation.

plural of emission

plural of emissivity

(physics) The energy-emitting propensity of a surface, usually measured at a specific wavelength.

Of, pertaining to, or having the capacity to emit radiation or matter; emitting

plural of acoustic emission

plural of secondary emission

plural of emissions test

plural of emission line

(uncountable, engineering, acoustics) A phenomenon wherein external stimuli such as mechanical loading generate physical vibrations.