| orbitonasal | <anatomy> Of or pertaining to the orbit and the nose; as, the orbitonasal, or ophthalmic, nerve. Origin: Orbit + nasal. Source: Websters Dictionary (01 Mar 1998) |
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| orbitonasal index | The ratio of the width between the lateral angles of the eyes, measured with a tape measure passing over the root of the nose times 100, to the width between the lateral angles of the eyes measured with a caliper. (05 Mar 2000) |