point source

point source
noun
a concentrated source (especially of radiation or pollution) that is spatially constricted
Hypernyms: ↑beginning, ↑origin, ↑root, ↑rootage, ↑source

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I. noun
: a source of light or other radiation that is concentrated at a point
II. noun
an identifiable confined source (as a smokestack or wastewater treatment plant) from which a pollutant is discharged or emitted — see nonpoint herein

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Physics, Optics.
a source of radiation sufficiently distant compared to its length and width that it can be considered as a point.
[1900-05]

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point source noun
A source of radiation that is, or is considered as, a mathematical point
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Main Entry:point

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point source,
a source of light waves, radio waves, or other electromagnetic radiation which is so highly concentrated that it can be considered to come from a single point.

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n. Physics
1) a source of energy, such as light or sound, that can be regarded as having negligible dimensions
2) a localized and stationary pollution source. Compare with nonpoint source

Useful english dictionary. 2012.

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