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 ]
n. [ NL. ] (Chem.) The oxide of zirconium (
cubic zirconia.
n. [ NL. ] (Chem.) The oxide of zirconium (
cubic zirconia.