{ } n. [ L. orbitudo, orbitas, fr. orbus: cf. F. orbité. See Orbate. ] Orbation. [ Obs. ] Bp. Hall. [ 1913 Webster ]

n. [ L. orbita a track or rut made by a wheel, course, circuit, fr. orbis a circle: cf. F. orbite. See 2d Orb. ] 1. (Astron.) The path described by a heavenly body in its periodical revolution around another body; as, the orbit of Jupiter, of the earth, of the moon. [ 1913 Webster ]

2. An orb or ball. [ Rare & Improper ] [ 1913 Webster ]

Roll the lucid orbit of an eye. Young. [ 1913 Webster ]

3. (Anat.) The cavity or socket of the skull in which the eye and its appendages are situated. [ 1913 Webster ]

4. (Zool.) The skin which surrounds the eye of a bird. [ 1913 Webster ]

a. Of or pertaining to an orbit. “Orbital revolution.” J. D. Forbes. [ 1913 Webster ]

Orbital index (Anat.), in the skull, the ratio of the vertical height to the transverse width of the orbit, which is taken as the standard, equal to 100. [ 1913 Webster ]

a. [ Cf. F. orbitaire. ] Orbital. [ R. ] Dunglison. [ 1913 Webster ]

a. Situated around the orbit; as, the orbitary feathers of a bird. [ 1913 Webster ]

‖n. pl. [ NL., fr. L. orbis an orb + tela a web. ] (Zool.) A division of spiders, including those that make geometrical webs, as the garden spider, or Epeira. [ 1913 Webster ]

prop. n. [ NL. See Orbit, and -lite. ] (Zool.) A genus of living Foraminifera, forming broad, thin, circular disks, containing numerous small chambers. [ 1913 Webster ]

a. [ Orbit + nasal. ] (Anat.) Of or pertaining to the orbit and the nose; as, the orbitonasal, or ophthalmic, nerve. [ 1913 Webster ]

a. [ Orbit + sphenoid. ] (Anat.) Of or pertaining to the sphenoid bone and the orbit, or to the orbitosphenoid bone. -- n. The orbitosphenoid bone, which is situated in the orbit on either side of the presphenoid. It generally forms a part of the sphenoid in the adult. [ 1913 Webster ]

a. (Anat.) Of or pertaining to the orbitosphenoid bone; orbitosphenoid. [ 1913 Webster ]

a. Orbital. [ R. ] [ 1913 Webster ]