Definitions

from The Century Dictionary.

  • In crystallography, pertaining to the three systems in which the axes are at right angles with each other. See crystallography.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Crystallog.) Having the axes at right angles to one another; -- said of crystals or crystalline forms.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective crystallography having axes at right angles
  • adjective surveying being corrected for the curvature of the Earth

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

ortho- + -metric

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