01 a. Of or pertaining to both the sphenoidal and the ethmoidal regions of the skull, or the sphenethmoid bone; sphenethmoidal.
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1.
Of or pertaining to both the sphenoidal and the ethmoidal regions of the skull, or the sphenethmoid bone; sphenethmoidal.(Anat.)
Phrases & compounds
Sphenethmoid bone —
a bone of the skull which surrounds the anterior end of the brain in many amphibia; the girdle bone.