berylloid
Ber"yl*loid, n. Etym: [Beryl + -oid.] (Crystallog.) Defn: A solid consisting of a double twelve-sided pyramid; -- so called because the planes of this form occur on crystals of beryl.
Ber"yl*loid, n. Etym: [Beryl + -oid.] (Crystallog.) Defn: A solid consisting of a double twelve-sided pyramid; -- so called because the planes of this form occur on crystals of beryl.