sphenoid bone(redirected from Os sphenoidum)
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sphenoid bone[′sfē‚nȯid ¦bōn]
The butterfly-shaped bone forming the anterior part of the base of the skull and portions of the cranial, orbital, and nasal cavities.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.