emission

[ ih-mish-uhn ]

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

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 See also secondary emission thermionic emission

   at 1000°C the emission is 3 mA

5. physiol any bodily discharge, esp an involuntary release of semen during sleep
6. an issue, as of currency

Derived Forms

• eˈmissive, adjective

Other Words From

• none·mission noun
• ree·mission noun

Word History and Origins

Origin of emission¹

First recorded in 1600–10; from Middle French or directly from Latin ēmissiōn- (stem of ēmissiō ), equivalent to ēmiss(us), past participle of ēmittere “to send forth” ( ē- “from, out of” + mit-, stem of mittere “to send” + -tus past participle suffix) + -iōn- noun suffix; emit, e- ¹, -ion

Word History and Origins

Origin of emission¹

C17: from Latin ēmissiō, from ēmittere to send forth, emit

Example Sentences

During energy questions in the Commons, Coutinho said making "already stringent carbon emission targets even higher" would require a "shift away from meat and dairy" and "less travel".

From BBC

As a candidate, President-elect Donald Trump repeatedly professed his love of clean air and water, but he also dismissed climate change as a hoax, railed against zero emission electric vehicles and expressed contempt for the environmental regulations that seek to protect California rivers and estuaries.

From Los Angeles Times

"Nevertheless, it is important to remember that each carbon dioxide emission causes another increment of global warming and so each emission avoided is an increment of global warming avoided."

From Salon

Although California is the only state in the nation that has been granted authority to set its own vehicle emission standards, the U.S.

From Los Angeles Times

"Nevertheless, it is important to remember that each carbon dioxide emission causes another increment of global warming and so each emission avoided is an increment of global warming avoided."

From Salon

Related Words

• discharge
• radiation