The Collaborative International Dictionary of English v.0.48:
Chromite \Chro"mite\, n. 1. (Min.) A black submetallic mineral consisting of oxide of chromium and iron; -- called also chromic iron. [1913 Webster] 2. (Chem.) A compound or salt of chromous hydroxide regarded as an acid. [R.] [1913 Webster]WordNet (r) 3.0 (2006):
chromite n 1: a brownish-black mineral; the major source of chromium