What does Berylloid mean?

Berylloid meaning in General Dictionary

a great comprising a double twelve-sided pyramid so-called because planes of this type happen on crystals of beryl

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  • A solid comprising a double twelve-sided pyramid; -- so named because the planes for this type happen on crystals of beryl.

Berylloid meaning in General Dictionary

(letter.) A good composed of a double twelve-sided pyramid; -- so named because the planes of this kind happen on crystals of beryl.