ANTIENNEAHE'DRAL, adjective [Gr. opposite, nine, and side.] In crystallography, having nine faces on two opposite parts of the crystal.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI
Founding-era definition · Webster's 1828 American Dictionary
ANTIENNEAHE'DRAL, adjective [Gr. opposite, nine, and side.] In crystallography, having nine faces on two opposite parts of the crystal.
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