GNU Collaborative International Dictionary of English
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Found 2 definitions
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Sphenethmoid , a. [Sphenoid + ethmoid.] (Anat.) Of or pertaining to both the sphenoidal and the ethmoidal regions of the skull, or the sphenethmoid bone; sphenethmoidal.1913 Webster
Sphenethmoid bone (Anat.), a bone of the skull which surrounds the anterior end of the brain in many amphibia; the girdle bone.
1913 Webster -
Sphenethmoid, n. (Anat.) The sphenethmoid bone.1913 Webster