D defs.my
Entry 1 sense Webster, 1913

Brachypinacoid

· Brach·y·pin·a·coid · IPA
01 n. A plane of an orthorhombic crystal which is parallel both to the vertical axis and to the shorter lateral (brachydiagonal) axis.
  1. 1.
    A plane of an orthorhombic crystal which is parallel both to the vertical axis and to the shorter lateral (brachydiagonal) axis.(Crytallog.)