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Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for zirconoid in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)


zircon +‎ -oid, because this form often occurs in zircon crystals.


zirconoid (plural zirconoids)

  1. (crystallography) A double eight-sided pyramid, a form common with tetragonal crystals.