orthochromatic

[ awr-thuh-kroh-mat-ik, -thoh-kruh- ]

/ ˌɔr θə kroʊˈmæt ɪk, -θoʊ krə- /

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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.

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Origin of orthochromatic

First recorded in 1885–90; ortho- + chromatic

Words nearby orthochromatic

ortho, orthoboric acid, orthocenter, orthocentre, orthocephalic, orthochromatic, orthoclase, orthoclastic, ortho-cousin, ortho-dichlorobenzene, orthodontia

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use orthochromatic in a sentence

On the few occasions when orthochromatic plates are used the lamp need not be lighted.
Photographs of Nebul and Clusters|James Edward Keeler
Only the freshest obtainable orthochromatic double-coated plates are used.
Book of Monsters|David Fairchild and Marian Hubbard (Bell) Fairchild
In actual practice an orthochromatic mixture of frequencies is used to give a black, gray and white picture.
The Airlords of Han|Philip Francis Nowlan
I will give to a common plate about four seconds, an orthochromatic plate under the same conditions five seconds.
Scientific American Supplement, No. 711, August 17, 1889|Various

The isochromatic and orthochromatic plates on the market are corrected, and are the best to use.
The Scrap Book, Volume 1, No. 1|Various

British Dictionary definitions for orthochromatic

orthochromatic

/ (ˌɔːθəʊkrəʊˈmætɪk) /

adjective

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 of orthochromatic

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