chromogen

American  

[kroh-muh-juhn, -jen] / ˈkroʊ mə dʒən, -ˌdʒɛn /

noun

1. Chemistry.

   1. any substance found in organic fluids that forms colored compounds when oxidized.

   2. a colored compound that, though not a dye itself, can be converted into a dye.

2. a chromogenic bacterium.

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chromogen British  

/ ˈkrəʊmədʒən /

noun

1. a compound that forms coloured compounds on oxidation

2. a substance that can be converted to a dye

3. a bacterium that produces a pigment

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Etymology

Origin of chromogen

First recorded in 1855–60; chromo- + -gen

Example Sentences

This excludes large areas of homogenous staining and areas of more diffuse, non-specific chromogen deposit.

From Nature • Sep. 8, 2015

The melanosis or blackening of insect blood, for instance, is due to the oxidation of a chromogen, the pigment produced being known as a uranidine.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" by Various

Whether albinoes carry the tyrosinase or other ferment, or whether they carry the chromogen or chromogens, is not yet settled.

From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg

Brown.—Anthracene brown, chromogen, cloth brown, diamond brown, alizarin brown, fast brown, alizarin acid brown, chrome brown, palatine chrome brown, erio chrome brown.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" by Various

Furth and Hugo Schneider showed that a tyrosinase could be obtained from the blood of certain insects, and, acting upon a chromogen present in the blood, converted it into a pigmentary substance of melanin-like nature.

From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg