Noun | 1. | emission - the act of emitting; causing to flow forth radiation - the act of spreading outward from a central source |
2. | emission - a substance that is emitted or released material, stuff - the tangible substance that goes into the makeup of a physical object; "coal is a hard black material"; "wheat is the stuff they use to make bread" transudate, transudation - a substance that transudes effluvium - a foul-smelling outflow or vapor (especially a gaseous waste) rheum - a watery discharge from the mucous membranes (especially from the eyes or nose) | |
3. | emission - the release of electrons from parent atoms photoemission - an emission of photoelectrons (especially from a metallic surface) field emission - the emission of electrons that are stripped from parent atoms by a high electric field photoelectric emission - the release or absorption of quanta above a certain energy level radioactivity, radiation - the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay release - a process that liberates or discharges something; "there was a sudden release of oxygen"; "the release of iodine from the thyroid gland" secondary emission - the emission of electrons from a surface that is bombarded by higher energy primary electrons thermal emission, thermionic emission - the emission of electrons from very hot substances | |
4. | emission - any of several bodily processes by which substances go out of the body; "the discharge of pus" bodily function, bodily process, body process, activity - an organic process that takes place in the body; "respiratory activity" excreting, excretion, voiding, elimination, evacuation - the bodily process of discharging waste matter menses, menstruation, catamenia, menstruum, period, flow - the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause; "the women were sickly and subject to excessive menstruation"; "a woman does not take the gout unless her menses be stopped"--Hippocrates; "the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females"--Aristotle | |
5. | emission - the occurrence of a flow of water (as from a pipe) |