orthorhombic

Of or relating to a crystalline structure of three mutually perpendicular axes of different length.

Rectangular and rhombic.

In crystallography, noting the system of crystallography which is characterized by three unequal axes intersecting at right angles; belonging to this system: as, sulphur is orthorhombic. Also called trimetric. See crystallography.

Noting the system of crystallization which has three unequal axes at right angles to each other; trimetric. See crystallization.

having three unequal axes at right angles