disphenoidn.
/dʌɪˈsfiːnɔɪd/ Crystallography.
A solid figure contained by eight isosceles triangles.
ΚΠ
1895 N. Story-Maskelyne Crystallogr. vii. §211. 256 The faces of the disphenoid being symmetrical in pairs.
This entry has not yet been fully updated (first published 1896; most recently modified version published online June 2018).
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n.1895