Presphenoid bone
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| (Anat.) | the anterior part of the body of the sphenoid bone in front of the basisphenoid. It is usually a separate bone in the young or fetus, but becomes a part of the sphenoid in the adult. |
See also: Presphenoid
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.