chrom-

1.
a combining form meaning “color,” used in the formation of compound words:
chromhydrosis.
2.
Chemistry.
  1. a combining form used in the names of chemical compounds in which chromium is present.
  2. a combining form that, when prefixed to the name of a chemical compound, denotes its colored form.
Also, -chrome; especially before a consonant, chromo-.
Origin
def. 1, for Greek chrôma color (see chroma); def. 2, for chromium
British Dictionary definitions for chrom-

chromo-

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

chrom- pref.
Variant of chromo-.