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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.


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.


(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.
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References in periodicals archive ?
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.