'Cassiterite' definitions:
Definition of 'cassiterite'
(from WordNet)
noun
A hard heavy dark mineral that is the chief source of tin
Definition of 'Cassiterite'
From: GCIDE
- Cassiterite \Cas*sit"er*ite\, n. [Gr. ? tin.] (Min.) Native tin dioxide; tin stone; a mineral occurring in tetragonal crystals of reddish brown color, and brilliant adamantine luster; also massive, sometimes in compact forms with concentric fibrous structure resembling wood ({wood tin}), also in rolled fragments or pebbly (Stream tin). It is the chief source of metallic tin. See Black tin, under Black. [1913 Webster]