disphenoid


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disphenoid

[dī′sfē‚nȯid]
(crystallography)
A crystal form with four similar triangular faces combined in a wedge shape; can be tetragonal or orthorhombic.
A crystal form with eight scalene triangles combined in pairs.
References in periodicals archive ?
bicupola puboiliac (W2) bigyrate betraying (W3) birotunda obdurating (W3) dipyramid pyramidoid (OED) disphenoid hypnoidised (W2 has the -ize infinitive form) elongated delegation (W3) gyrate tragedy (W3) pyramid myriapod (W3) rotunda untoward (W3) triangular granularity (W3)