egression, egress, emergence - the act of coming (or going) out; becoming apparent

radiation - the act of spreading outward from a central source

venting, discharge - the act of venting

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"

exudate, exudation - a substance that oozes out from animal or plant pores

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)

vaginal discharge - discharge of secretions from the cervical glands of the vagina; normally clear or white

photoemission - 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

bodily function, bodily process, body process, activity - an organic process that takes place in the body; "respiratory activity"

ejaculation - the discharge of semen in males

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

flow, flowing - the motion characteristic of fluids (liquids or gases)