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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.) |
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