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bisphenoid

[bahy-sfee-noid]
noun Crystallography.
  1. a tetrahedral form, each edge of which is bisected by the perpendicular bisecting the edge that does not intersect it.
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Origin of bisphenoid

Also called disphenoid.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018