comparative form of low-emission: more low-emission

superlative form of low-emission: most low-emission

Producing fewer pollutants to be emitted into the atmosphere.

(physics) The emission of electrons from a metal or semiconductor, under the influence of a strong electric field, by quantum tunnelling.

(physics) A form of radioactivity in which alpha particles are emitted from the nucleus of an atom

(physics) The emission of electrons from the surface of a solid when bombarded with electrons or other charged particles

An ejaculation or orgasm while asleep, often accompanied by an erotic dream.

(astronomy) A nebula composed of ionized gases which produce visible light (as distinct from a reflection nebula, which reflects the light produced by neighboring stars).

plural of emission nebula

plural of emission nebula