What is a solid consisting of a double twelve-sided pyramid; -- so called because the planes of this form occur on crystals of beryl called?
berylloid — A solid consisting of a double twelve-sided pyramid; -- so called because the planes of this form occur on crystals of beryl. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00