Dichromate \Di*chro"mate\, n. (Chem.) A salt of chromic acid containing two equivalents of the acid radical to one of the base; -- called also bichromate.
Source: Webster's Revised Unabridged Dictionary (1913)
Bichromate \Bi*chro"mate\, n. [Pref. bi- + chromate.] (Chem.) A salt containing two parts of chromic acid to one of the other ingredients; as, potassium bichromate; -- called also dichromate.