from The Century Dictionary.
- noun In crystallography, a solid contained under twenty-four triangles; a tetrahexahedron (which see): so called because it is a frequent form in fluor-spar.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Crystallog.) A tetrahexahedron; -- so called because it is a common form of fluorite.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun crystallography A
from Wiktionary, Creative Commons Attribution/Share-Alike License
fluor + -oid. The shape is a common form of fluorite.
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