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