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bioluminescence the emission of light produced naturally by certain kinds of insects, fish, or bacteria, or such light itself.
decarboxylate to remove a carbonyl group from (an organic compound), resulting in the emission of carbon dioxide.
discharge something ejected or emitted, or the rate or amount of emission. [1/17 definitions]
fizz the emission of a fizzing sound; effervescence. [1/4 definitions]
irradiation emission of electromagnetic radiation, or the state of being exposed to such radiation. [1/2 definitions]
laser a device that amplifies electrical impulses at mixed frequencies in or near the range of visible light by stimulating the atoms in a medium such as a gas or crystal, producing an intense, concentrated beam of light at one or more virtually distinct frequencies (acronym for "light amplified by stimulated emission of radiation").
maser a device that amplifies electromagnetic waves and concentrates them at a single microwave frequency (acronym for "microwave amplification by stimulated emission of radiation").
phosphorescence the emission of light with little heat that results from the absorption of radiation and persists after the radiation exposure has ceased. [1/2 definitions]
photoelectron an electron whose emission from a substance is induced by the absorption of electromagnetic radiation such as visible light.
photoemission the emission of photoelectrons from a surface, esp. a metallic one, induced by the absorption of electromagnetic radiation such as visible light.
puff a brief, forceful emission of breath, air, or vapor. [2/16 definitions]
radiation the emission of particles or waves of energy, as by radioactive material or by electrical circuits or devices. [1/3 definitions]
radioactivity the emission or amount of emission of energy or subatomic particles by the nuclei of certain unstable isotopes of elements as they decay.
reemission combined form of emission.
secondary emission the emission of electrons or electromagnetic radiation from a material that has been bombarded with electrons or ions.
thermionic tube a vacuum tube in which an electrically heated cathode causes the emission of electrons or ions.
weak interaction a weak force between elementary particles that is responsible for beta decay, neutrino absorption and emission, and some particle decay. (Cf. strong interaction.)