from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A source, especially of pollution or radiation, occupying a very small area and having a concentrated output.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a source of pollution, radiation, waves, fluid or other substance that has one specific location (and negligible physical extent, distinguishing a point source from other source geometries). In simulations they can often be approximated using mathematical point sources.
- n. the abstract concept of a singularity emitting a flux or flow. A source with infinitesimal dimensions in space.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a concentrated source (especially of radiation or pollution) that is spatially constricted
Sorry, no etymologies found.
The pellet is small but incredibly brilliant — a point source of blazing light.
Lucot, P. M. Badot, et al., “A municipal solid waste incinerator as the single dominant point source of PCDD/Fs in an area of increased non-Hodgkin’s lymphoma incidence,” Chemosphere vol. 68, no. 8, 2007, pp.1419–26; T.