Having one oblique intersection; -- said of that system of crystallization in which the vertical axis is inclined to one, but at right angles to the other, lateral axis. See Crystallization.

A crystal system where the cell dimensions (a,b,c) are of unequal length. Two of the axes are at 90deg to each other, whilst the third is not.

having three unequal crystal axes with one oblique intersection; "monoclinic system"

It is a mineral with three axes of unequal length of two are at right angles to each other and the third lies at an angle other than 90

Crystals are short and stubby with tilted faces at each end. Each crystal has three unequal axes. Two axes lie in the same plane at right angles to each other. The third axis is inclined. Example: gypsum.

(mon-o-clinÂ´-ic) One of six crystal systems, characterized by either a single twofold axis of symmetry, a single plan of symmetry, or a combination of the two. Crystals belonging to this system are referred to three unequal crystallographic axes, two of which intersect obliquely and the third perpendicular to the plane formed by the other two.

Monoclinic minerals have a crystalline structure in which there is one two-fold axis of symmetry. Jade, Malachite and moonstone are monoclinic.

A system of crystallization wherein two crystal axes intersect obliquely and are perpendicular to the third. See Amphibole.