The Collaborative International Dictionary of English v.0.48:

Berylloid \Ber"yl*loid\, n. [Beryl + -oid.] (Crystallog.)
   A solid consisting of a double twelve-sided pyramid; -- so
   called because the planes of this form occur on crystals of
   beryl.
   [1913 Webster] Besaile
   Besaiel