Sheath process of sphenoid bone

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sheath process of sphenoid bone --> vaginal process of sphenoid bone

A thin lamina of bone that extends medially under the body of the sphenoid bone from the medial lamina of the pterygoid process; it articulates with the vomer and the palatine bone.

Synonym: processus vaginalis ossis sphenoidalis, sheath process of sphenoid bone.