1. a combining form meaning “color,” used in the formation of compound words: chromhydrosis.
a. a combining form used in the names of chemical compounds in which chromium is present.
b. a combining form that, when prefixed to the name of a chemical compound, denotes its colored form. Also,-chrome; esp. before a consonant,chromo-.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.