The Collaborative International Dictionary
Subsphenoidal
Subsphenoidal \Sub`sphe*noid"al\, a. (Anat.) Situated under, or on the ventral side of, the body of the sphenoid bone.
Wiktionary
subsphenoidal
a. (context anatomy English) Situated under, or on the ventral side of, the body of the sphenoid bone.