An Etymological Dictionary of Astronomy and Astrophysics
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Of or relating to a crystalline structure characterized by three mutually perpendicular axes of different length. → orthorhombic crystal system.

→ ortho-; → rhombic.

A → crystal system that has three mutually perpendicular axes, each of which is of a different length than the others.

→ orthorhombic; → crystal; → system.

Shaped like a rhombus.

From rhomb, → rhombus, + → -ic.