different between orbitary vs orbituary

English

orbit +? -ary

orbitary (not comparable)

orbituary (not comparable)

(archaic) orbital
- 1828, American Medical Recorder (volumes 13-14, page 328)
  It would be impossible, while the sun or electric body remained unaltered, and these planets retained their primary condition, that their axillary and orbituary motions, and distances from the centre, should ever change through an endless succession of ages.
- 1907, Official gazette of the United States Patent Office
  In an engine, the combination of an expansion-chamber and piston therefor, means supporting said chamber and piston for orbituary movement […]

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