† orthosymmetryn.
Crystallography. Obsolete. rare.
Symmetry about perpendicular axes.
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orthosymmetry1878
trigonal symmetry1878
holosymmetry1895
tetartosymmetry1895
self-coincidence1904
1878 H. P. Gurney Crystallogr. 37 Orthogonal symmetry or orthosymmetry.
1895 N. Story-Maskelyne Crystallogr. §421 The Ortho-symmetric or Ortho-rhombic system represents the most general case of a crystallographic plane-system referred to rectangular axes; [that] in which the parameters are all different, and the three axes are axes of orthosymmetry.
This entry has been updated (OED Third Edition, September 2004; most recently modified version published online June 2018).
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