zirconoid


From The Collaborative International Dictionary of English v.0.48:

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]
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