Etymology: chrom- + protein
: any of a class of compounds (as hemoglobin) of a protein with a metal-containing pigment (as heme) or with a carotenoid
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/kroh'meuh proh"teen, -tee in/, n. Biochem.
a protein, as hemoglobin or rhodopsin, containing a pigmented nonprotein group, such as heme, riboflavin, or retinal.
[1920-25; CHROMO- + PROTEIN]
Useful english dictionary. 2012.