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EMISSION

Pronunciation (US): 

 Dictionary entry overview: What does emission mean? 

EMISSION (noun)
  The noun EMISSION has 5 senses:

1. the act of emitting; causing to flow forth
2. a substance that is emitted or released
3. the release of electrons from parent atoms
4. any of several bodily processes by which substances go out of the body
5. the occurrence of a flow of water (as from a pipe)

  Familiarity information: EMISSION used as a noun is common.


 Dictionary entry details 


EMISSION (noun)


Sense 1emission [BACK TO TOP]

Meaning:

The act of emitting; causing to flow forth

Classified under:

Nouns denoting acts or actions

Synonyms:

emission; emanation

Hypernyms ("emission" is a kind of...):

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

Hyponyms (each of the following is a kind of "emission"):

radiation (the act of spreading outward from a central source)

discharge; venting (the act of venting)


Sense 2emission [BACK TO TOP]

Meaning:

A substance that is emitted or released

Classified under:

Nouns denoting substances

Synonyms:

emission; discharge

Hypernyms ("emission" is a kind of...):

material; stuff (the tangible substance that goes into the makeup of a physical object)

Hyponyms (each of the following is a kind of "emission"):

exudate; exudation (a substance that oozes out from 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)


Sense 3emission [BACK TO TOP]

Meaning:

The release of electrons from parent atoms

Classified under:

Nouns denoting natural processes

Hypernyms ("emission" is a kind of...):

release (a process that liberates or discharges something)

Hyponyms (each of the following is a kind of "emission"):

thermal emission; thermionic emission (the emission of electrons from very hot substances)

secondary emission (the emission of electrons from a surface that is bombarded by higher energy primary electrons)

radiation; radioactivity (the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay)

photoelectric emission (the release or absorption of quanta above a certain energy level)

field emission (the emission of electrons that are stripped from parent atoms by a high electric field)

photoemission (an emission of photoelectrons (especially from a metallic surface))


Sense 4emission [BACK TO TOP]

Meaning:

Any of several bodily processes by which substances go out of the body

Classified under:

Nouns denoting natural processes

Synonyms:

expelling; discharge; emission

Context example:

the discharge of pus

Hypernyms ("emission" is a kind of...):

activity; bodily function; bodily process; body process (an organic process that takes place in the body)

Hyponyms (each of the following is a kind of "emission"):

ejaculation (the discharge of semen in males)

elimination; evacuation; excreting; excretion; voiding (the bodily process of discharging waste matter)

catamenia; flow; menses; menstruation; menstruum; period (the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause)


Sense 5emission [BACK TO TOP]

Meaning:

The occurrence of a flow of water (as from a pipe)

Classified under:

Nouns denoting natural events

Hypernyms ("emission" is a kind of...):

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


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