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[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 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for orthochromatic


(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 light Sometimes 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
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orthochromatic in Medicine

orthochromatic or·tho·chro·mat·ic (ôr'thə-krō-māt'ĭk)
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.
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