Definitions for orthochromaticˌɔr θə kroʊˈmæt ɪk, -θoʊ krə-
This page provides all possible meanings and translations of the word orthochromatic
Being uniformly sensitive across the entire visible range, and thus reproducing colours faithfully
Sensitive to all colours except red
In chemistry orthochromatic refers to a dye or stain which does not change color on binding to a target as opposed to metachromatic stains which change color. In literal sense it comes from ortho ie straight or correct + chromatic ie colored. As for example Toluidine blue stains nucleic acids by its orthochromatic color but it stains mast cell granules by becoming metachromatic which in this case is red. In spectral terms orthochromatic refers to maintaining the position of the spectral peaks and metachromatic in contrast refers to a shift in the position which can be either hypsochromic or bathochromic depending on its direction. In photography Orthochromatic refers to any spectrum of light that is devoid of red light.
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"orthochromatic." Definitions.net. STANDS4 LLC, 2015. Web. 27 Apr. 2015. <http://www.definitions.net/definition/orthochromatic>.