| 单词 | point source |
| 释义 | point sourcenoun Physics, Optics.a source of radiation sufficiently distant compared to its length and width that it can be considered as a point. Origin of point sourceFirst recorded in 1900–05 Words nearby point sourcePoint Pleasant, Point Reyes lilac, point-set, point shaving, pointsman, point source, point spread, points system, Point Success, point system, point-system test types Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for point sourcepoint source nounoptics 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 Medical definitions for point sourcepoint source n.A source, especially of pollution or radiation, occupying a very small area and having a concentrated output. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. |
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