The Collaborative International Dictionary
Polybromide
Polybromide \Pol`y*bro"mide\, n. [Poly- + bromide.] (Chem.) A bromide containing more than one atom of bromine in the molecule.
Wiktionary
polybromide
a. (context chemistry of a molecule or ion English) containing three or more bromine atoms n. (context chemistry English) A molecule or ion containing three or more bromine atoms