the measurement of the intensity of light or of relative illuminating power.
the science dealing with such measurements.
Origin of photometry
Related formspho·to·met·ric [foh-tuh-me-trik] /ˌfoʊ təˈmɛ trɪk/, pho·to·met·ri·cal, adjectivepho·tom·e·trist, pho·to·me·tri·cian [foh-tuh-me-trish-uh n] /ˌfoʊ tə mɛˈtrɪʃ ən/, noun
From the New Latin
dating back to 1815–25.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for photometry
Historical Examples of photometry
Celestial photography, photometry and spectroscopy sum up its fields of activity.
This arrangement leaves untouched the old difficulty in photometry, that arising from the different colors of different lights.
An important matter in connexion with glow lamps is their photometry.
Considerations drawn from photometry were also lost sight of, because that art was still undeveloped.
Its precedence over its rivals Vega and Capella, long in dispute, has been settled by the Harvard photometry.
British Dictionary definitions for photometry
Derived Formsphotometric (ˌfəʊtəˈmɛtrɪk), adjectivephotometrically, adverbphotometrist, noun
the measurement of the intensity of light
the branch of physics concerned with such measurements
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
The measurement of the intensity, brightness, or other properties of light. Also called photometrics See also luminous intensity.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.