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From The Collaborative International Dictionary of English v.0.48:
Orbit \Or"bit\, 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]