TRIACONTAHE'DRAL, adjective [Gr. thirty, and side.] Having thirty sides. In mineralogy, bounded by thirty rhombs.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI
Founding-era definition · Webster's 1828 American Dictionary
TRIACONTAHE'DRAL, adjective [Gr. thirty, and side.] Having thirty sides. In mineralogy, bounded by thirty rhombs.
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