Noun
A compound of a binary type containing two atoms of iodine; -- called also biniodide.
Source: Webster's dictionaryThe lower oxidation states are stabilized by the larger halogens, so that the trichloride, tribromide, triiodide, and even diiodide are known. Source: Internet
Of the dihalides, difluoride is not known, dichloride is brown, dibromide is black, and diiodide is blue. Source: Internet