A discharge; referring usually to a discharge of the male internal genital organs into the internal urethra; the contents of the organs, including sperm cells, prostatic fluid, and seminal vesicle fluid, mix in the internal urethra with mucus from the bulbourethral glands to form semen. [L. emissio, fr. e- mitto, to send out]
- characteristic e. SYN: characteristic radiation.
- continuous otoacoustic e. a form of evoked otoacoustic e. in which the e. is of the same frequency as the stimulus and persists as long as the stimulus.
- distortion-product otoacoustic e. a form of evoked otoacoustic e. in which a third frequency is produced when two pure tones are used as the stimulus.
- evoked otoacoustic e. a form resulting from acoustic stimulation, as opposed to spontaneous otoacoustic e..
- otoacoustic e. sound emanating from the ear that can be recorded from minute microphones placed in the external auditory canal and is thought to be produced by the outer hair cells in the cochlea. Otoacoustic emissions occur spontaneously and can be evoked by acoustic stimuli; they are more prominent in women than in men and are particularly robust in infants. Indicative of the integrity of the auditory hair cells, they are measured to screen newborns for hearing impairment.
- transient evoked otoacoustic e. a form in which the response is limited in time.

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emis·sion ē-'mish-ən n
1) an act or instance of emitting
2 a) something sent forth by emitting: as (1) electrons discharged from a surface (2) electromagnetic waves radiated by an antenna or a celestial body (3) substances and esp. pollutants discharged into the air (as by a smokestack or an automobile gasoline engine)
b) a discharge of fluid from a living body esp EJACULATE see NOCTURNAL EMISSION

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the flow of semen from the erect penis, usually occurring while the subject is asleep (nocturnal emission).

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emis·sion (e-mishґən) [L. emissio, a sending out] 1. discharge (def. 1). 2. an involuntary discharge of semen.

Medical dictionary. 2011.

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  • Emission — Emission …   Deutsch Wörterbuch

  • émission — [ emisjɔ̃ ] n. f. • 1390; lat. emissio 1 ♦ Physiol. Action de projeter (un liquide) hors de l organisme; écoulement sous pression. Émission d urine (⇒ miction) ; de sperme (⇒ éjaculation) . 2 ♦ (XVIe) Production (de sons vocaux). Émission d un… …   Encyclopédie Universelle

  • Emission — may refer to: * Flue gas, also: ** Exhaust gas, flue gas occurring as a result of the combustion of a fuel * Emission of air pollutants * Emission (electromagnetic radiation), the process by which the energy of a photon is released by another… …   Wikipedia

  • Emission — Émission Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom …   Wikipédia en Français

  • Emission — in physikalischem Sinn, Aussendung von strahlender Energie (Licht , Wärme , Kathoden , Röntgen , Radiumstrahlen) von der Oberfläche eines Körpers in den umgebenden Raum. Zu unterscheiden ist die Emanation, Aussendung stofflicher Substanz; z.B.… …   Lexikon der gesamten Technik

  • Emission — (lateinisch emittere ‚aussenden‘“) bezeichnet: Emission (Physik), die Aussendung von Wellen oder Teilchen Emission (Umwelt), in der Ökologie eine Abgabe von Substanzen an die Umwelt – beispielsweise in Abwässern und Abgasen Emission… …   Deutsch Wikipedia

  • Emission — E*mis sion, n. [L. emissio: cf. F. [ e]mission. See {Emit}.] 1. The act of sending or throwing out; the act of sending forth or putting into circulation; issue; as, the emission of light from the sun; the emission of heat from a fire; the… …   The Collaborative International Dictionary of English

  • émission — ÉMISSION. s. f. Terme didactique. Action par laquelle une chose est poussée au dehors. L émission des rayons du soleil. L odeur est l impression que fait sur nous l émission des corpuscules émanés des corps odorans. [b]f♛/b] On dit en termes de… …   Dictionnaire de l'Académie Française 1798

  • Emission — Sf Ausgabe (Wertpapiere, Briefmarken); Ausströmen von Schadstoffen per. Wortschatz fach. (16. Jh.) Entlehnung. Entlehnt aus frz. émission, dieses aus l. ēmissio Hinausschicken , Abstraktum zu l. ēmittere heraus , hinausschicken zu l. mittere… …   Etymologisches Wörterbuch der deutschen sprache

  • emission — UK US /ɪˈmɪʃən/ noun ENVIRONMENT ► [C, usually plural] an amount of something, especially a gas that harms the environment, that is sent out into the air: emissions of sth »The bill is intended to lower emissions of greenhouse gases.… …   Financial and business terms

  • emission — Emission. s. m. Terme dogmatique. Action par laquelle on pousse quelque chose au dehors. Il se dit principalement des rayons de lumiere. L emission des rayons du Soleil. Quelques uns ont cru que l action de la veuë se faisoit par l emission des… …   Dictionnaire de l'Académie française

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