1. a combining form meaning "color," used in the formation of compound words: chromhydrosis.
2. Chem.
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- .
[ def. 1, for Gk chrôma color (see CHROMA); def. 2, for CHROMIUM ]