资料来源 : pyDict

长轴面

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Macropinacoid \Mac`ro*pin"a*coid\, n. [Macro- + pinacoid.]
   (Crystallog.)
   One of the two planes of an orthorhombic crystal which are
   parallel to the vertical and longer lateral (macrodiagonal)
   axes.