facial angle(redirected from Frankfurt-mandibular incisor angle)
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facial angle[¦fā·shəl ′aŋ·gəl]
The angle formed by the union of a line connecting nasion and gnathion with the Frankfort horizontal plane of the head.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.