photometry

[foh-tom-i-tree]

noun

the measurement of the intensity of light or of relative illuminating power.
the science dealing with such measurements.

Origin of photometry

From the New Latin word photometria, dating back to 1815–25. See photo-, -metry

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for photometric

Historical Examples of photometric

This fact simply emphasizes the lack of mathematical precision in photometric measurements of star light.
The Popular Science Monthly, July, 1900
Various
Its use for photometric purposes and in current regulators will be mentioned further on.
Scientific American Supplement, No. 492, June 6, 1885
Various
As the photometric experiments are recent, let us suppose that it gives but 25 carcels.
Scientific American Supplement, No. 1082, September 26, 1896
Various
According to the Harvard photometric measures its brightest star is Fl.
Astronomical Curiosities
J. Ellard Gore
The satellite-theory has derived unlooked-for support from photometric inquiries.
A Popular History of Astronomy During the Nineteenth Century
Agnes M. (Agnes Mary) Clerke

British Dictionary definitions for photometric

photometry

noun

the measurement of the intensity of light
the branch of physics concerned with such measurements

Derived Formsphotometric (ˌfəʊtəˈmɛtrɪk), adjectivephotometrically, adverbphotometrist, noun

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

photometric in Science

photometry

[fō-tŏm′ĭ-trē]

The measurement of the intensity, brightness, or other properties of light. Also called photometrics See also luminous intensity.