macroprism

from The Century Dictionary.

• noun A prism of an ortho-rhombic crystal lying between the unit prism and the macropinacoid.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Crystallog.) A prism of an orthorhombic crystal between the macropinacoid and the unit prism; the corresponding pyramids are called macropyramids.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A prism of an orthorhombic crystal between the macropinacoid and the unit prism; the corresponding pyramids are called macropyramids.