'Zirconoid' definitions:

Definition of 'Zirconoid'

From: GCIDE

Zirconoid \Zir"con*oid\, n. [Zircon + oid.] (Crystallog.) A double eight-sided pyramid, a form common with tetragonal crystals; -- so called because this form often occurs in crystals of zircon. [1913 Webster]