| / English Dictionary |
EMISSION
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The act of emitting; causing to flow forth
Synonyms:
Classified under:
Nouns denoting acts or actions
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)
Derivation:
emit (expel (gases or odors))
emit (give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.)
Sense 2
Meaning:
The occurrence of a flow of water (as from a pipe)
Classified under:
Hypernyms ("emission" is a kind of...):
flow; flowing (the motion characteristic of fluids (liquids or gases))
Sense 3
Meaning:
Any of several bodily processes by which substances go out of the body
Example:
the discharge of pus
Synonyms:
discharge; emission; expelling
Classified under:
Nouns denoting natural processes
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 4
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"):
photoemission (an 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)
radiation; radioactivity (the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay)
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)
Sense 5
Meaning:
A substance that is emitted or released
Synonyms:
discharge; emission
Classified under:
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)
Context examples:
The Environmental Protection Agency (EPA) sets standards to control the emission of these particulates and to protect the public health.
(Airborne Particulate Matter, NCI Thesaurus)
The process by which an image is acquired by recording light emissions.
(Photography, NCI Thesaurus/CDISC)
The more you are in the open air the lower the mobile's emissions.
(Health threats caused by mobile phone radiation, EUROPARL TV)
Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles.
(Air Pollution, Environmental Protection Agency)
A radioactive form of carbon that is used in positron emission tomography (PET) scanning.
(Carbon-11 acetate, NCI Dictionary)
A procedure that combines the pictures from a positron emission tomography (PET) scan and a computed tomography (CT) scan.
(PET-CT scan, NCI Dictionary)
Also called positron emission tomography scan.
(PET scan, NCI Dictionary)
A radiopharmaceutical containing an analogue of tryptophan, alpha-methyltryptophan (AMT), labeled with carbon 11 (11C), used to measure serotonin synthesis in the human brain using positron emission tomography (PET).
(Carbon C 11 Alpha-methyltryptophan, NCI Thesaurus)
The process by which an image is acquired by recording light emissions on radiation-sensitive paper.
(Photography, NCI Thesaurus)
It's one of several recently developed negative emissions techniques that seek to make carbon capture and storage cheaper, safer and more efficient.
(Scientists Turn CO2 into Solid Coal, The Titi Tudorancea Bulletin)
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