chromogen

[kroh-muh-juhn, -jen]

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.

chromogen

/ 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

Word History and Origins

Origin of chromogen¹

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.

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

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It is supposed to exist in the cells of algæ, chiefly as a colorless chromogen, which becomes first yellow and then brown on exposure to air.

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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.

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