D defs.my
Entry 1 sense Webster, 1913

Orthorhombic

· Or·tho·rhom·bic · IPA /ɔː(ɹ)θəˈɹɒmbɪk/
01 a. Noting the system of crystallization which has three unequal axes at right angles to each other; trimetric. See Crystallization.
  1. 1.
    Noting the system of crystallization which has three unequal axes at right angles to each other; trimetric. See Crystallization.(Crystallog.) See: Crystallization