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point source

American

noun

Physics, Optics.

a source of radiation sufficiently distant compared to its length and width that it can be considered as a point.

point source British

noun

optics a source of light or other radiation that can be considered to have negligible dimensions

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of point source

First recorded in 1900–05

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023