Brachypinacoid
Pronunciation : Brach`y*pin"a*coid
Part of Speech : n.
Etymology : [Gr. pinacoid.] (Crytallog.)
Definition : Defn: A plane of an orthorhombic crystal which is parallel both to the vertical axis and to the shorter lateral (brachydiagonal) axis.
Source : Webster's Unabridged Dictionary, 1913