chromo-

1.
variant of chrom- before a consonant:
chromophore.
British Dictionary definitions for chromo-

chromo-

combining form
1.
indicating colour, coloured, or pigment: chromogen
2.
indicating chromium: chromyl
Word Origin
from Greek khrōma colour
chromo- in Medicine

chromo- or chrom-
pref.
Color: chromogenesis.