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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
“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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Word History and Origins

Origin of chromogen1

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

In other words, an auxochrome in addition to the chromophore group transforms a colorless chromogen into a colored one.

The chromogen or pigmentary bacteria have occasionally been the means of working miracles.

A colorless chromogen is formed, which oxidizes to the green pigment in the air.

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