Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of pinacoid is as below...

Orthopinacoid :: Orthopinacoid (n.) A name given to the two planes in the monoclinic system which are parallel to the vertical and orthodiagonal axes.

Brachypinacoid :: Brachypinacoid (n.) A plane of an orthorhombic crystal which is parallel both to the vertical axis and to the shorter lateral (brachydiagonal) axis.

Clinopinacoid :: Clinopinacoid (n.) The plane in crystals of the monoclinic system which is parallel to the vertical and the inclined lateral (clinidiagonal) axes.

Pinacoid :: Pinacoid (n.) A plane parallel to two of the crystalline axes.

Macropinacoid :: Macropinacoid (n.) One of the two planes of an orthorhombic crystal which are parallel to the vertical and longer lateral (macrodiagonal) axes.

Macroprism :: Macroprism (n.) A prism of an orthorhombic crystal between the macropinacoid and the unit prism; the corresponding pyramids are called macropyramids.

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