資料來源 : pyDict

正交軸面

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Orthopinacoid \Or`tho*pin"a*coid\, n. [Ortho- + pinacoid.]
   (Crystallog.)
   A name given to the two planes in the monoclinic system which
   are parallel to the vertical and orthodiagonal axes.