- any substance that can become a pigment or coloring matter, as a substance in organic fluids that forms colored compounds when oxidized, or a compound, not itself a dye, that can become a dye
- any of certain bacteria that produce a pigment
Origin of chromogenchromo- + -gen
- Chemistry A substance capable of conversion into a pigment or dye.
- Biology A strongly pigmented or pigment-generating organelle, organ, or microorganism.