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emission

[ih-mish-uh n] /ɪˈmɪʃ ən/
noun
1.
an act or instance of emitting:
the emission of poisonous fumes.
2.
something that is emitted; discharge; emanation.
3.
an act or instance of issuing, as paper money.
4.
Electronics. a measure of the number of electrons emitted by the heated filament or cathode of a vacuum tube.
5.
an ejection or discharge of semen or other fluid from the body.
Synonyms: ejaculation.
6.
the fluid ejected or discharged.
Synonyms: ejaculate.
Origin
1600-1610
1600-10; (< Middle French) < Latin ēmissiōn- (stem of ēmissiō), equivalent to ēmiss(us), past participle of ēmittere to emit (ē- e-1 + mit- send + -tus past participle suffix) + -iōn- -ion
Related forms
nonemission, noun
reemission, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for emissions
  • These are the greenhouse-gas emissions from two universities.
  • emissions and pollution are a key concern with traditional power sources.
  • emissions from the ships' smokestacks have particles that cause water vapor to condense as clouds.
  • Everyone knows easing up on the accelerator can improve your fuel economy and reduce your emissions.
  • Plans for cutting emissions could also benefit health.
  • We can limit the pain by taking action now, by being a responsible nation and limiting our greenhouse gas emissions.
  • Ever-tighter fuel economy and emissions regs, not to mention changing consumer tastes, have automakers doing more with less.
  • The cost of emissions reductions may vary considerably from one year to the next.
  • Methane emissions result from fossil fuel production, livestock farming and other agricultural practices.
  • Building jet engines out of superconducting materials may offer a way to lower aircraft emissions in the long run.
British Dictionary definitions for emissions

emission

/ɪˈmɪʃən/
noun
1.
the act of emitting or sending forth
2.
energy, in the form of heat, light, radio waves, etc, emitted from a source
3.
a substance, fluid, etc, that is emitted; discharge
4.
a measure of the number of electrons emitted by a cathode or electron gun: at 1000°C the emission is 3 mA See also secondary emission, thermionic emission
5.
(physiol) any bodily discharge, esp an involuntary release of semen during sleep
6.
an issue, as of currency
Derived Forms
emissive, adjective
Word Origin
C17: from Latin ēmissiō, from ēmittere to send forth, emit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for emissions

emission

n.

early 15c., "something sent forth," from Middle French émission (14c.) and directly from Latin emissionem (nominative emissio) "a sending out, projecting, hurling, letting go, releasing," from past participle stem of emittere "send out" (see emit). Meaning "a giving off or emitting" is from 1610s.

Online Etymology Dictionary, © 2010 Douglas Harper
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emissions in Medicine

emission e·mis·sion (ĭ-mĭsh'ən)
n.
A discharge of fluid from a living body, usually a seminal discharge.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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