[ awr-thuh-kroh-mat-ik, -thoh-kruh- ]
/ ˌɔr θə kroʊˈmæt ɪk, -θoʊ krə- /

adjective Photography.

representing correctly the relations of colors as found in a subject; isochromatic.
(of an emulsion) sensitive to all visible colors except red; isochromatic.

Origin of orthochromatic

First recorded in 1885–90; ortho- + chromatic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for orthochromatic

British Dictionary definitions for orthochromatic


/ (ˌɔːθəʊkrəʊˈmætɪk) /


photog of or relating to an emulsion giving a rendering of relative light intensities of different colours that corresponds approximately to the colour sensitivity of the eye, esp one that is insensitive to red lightSometimes shortened to: ortho Compare panchromatic

Derived Forms

orthochromatism (ˌɔːθəʊˈkrəʊməˌtɪzəm), 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

Medicine definitions for orthochromatic


[ ôr′thə-krō-mătĭk ]


Staining with the same color as that of the dye used. Used of a cell or tissue.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.