The Collaborative International Dictionary
Polychromate
Polychromate \Pol`y*chro"mate\, n. [See Polychromic.] (Chem.) A salt of a polychromic acid.
Polychromate
Polychromate \Pol`y*chro"mate\, n. [See Polychromatic.] (Chem.) A compound which exhibits, or from which may be prepared, a variety of colors, as certain solutions derived from vegetables, which display colors by fluorescence.
Wiktionary
polychromate
a. Composed of many colours n. (context inorganic chemistry English) A salt or ion composed of multiple chromate groups