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1. Chemistry A substance capable of conversion into a pigment or dye.
2. Biology A strongly pigmented or pigment-generating organelle, organ, or microorganism.

chro′mo·gen′ic (-jĕn′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Chemistry) producing colour
2. (Chemistry) of or relating to a chromogen
3. (Photography) photog involving the use of chromogens rather than silver halide during processing to produce the image: chromogenic film.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌkroʊ məˈdʒɛn ɪk)

1. producing color.
2. pertaining to a chromogen.
3. (of bacteria) producing some characteristic color or pigment that is useful as a means of identification.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Isolates with smooth to greasy, domed, nonchromogenic colonies were recovered from all submitted samples using both 7H11 agar and MGIT broth (Becton Dickinson, Fukushima, Japan) and identified as MTBC using loop-mediated isothermal amplification (Eiken Chemical, Tokyo, Japan) and TaqMan PCR (Roche Diagnostics, Tokyo, Japan) (9).
Nordmann et al (39) developed a novel screening medium (a nonchromogenic medium) called Supercarba that exhibited a high sensitivity (96.5%) for all carbapenemase including OXA-48 producers.
neoaurum colonies also have a characteristic yellowish-orange smooth appearance that is distinct from the colony characteristics of nonchromogenic mycobacterium species.
Specific interactions of surfactants with lipoproteins have been successfully used to develop direct lipoprotein-C assays in which non-LDL lipoproteins are dissociated with a specific surfactant to allow the cholesterol to be accessed as a nonchromogenic product.
nov., a nonchromogenic bacterium isolated from clinical specimens.