I. “+ noun
Etymology: pre- + sphenoid
: a presphenoid bone or cartilage usually united with the basisphenoid in the adult and in man forming the anterior part of the body of the sphenoid
II. adjective
also pre·sphenoidal |prē+
Etymology: presphenoid from presphenoid (I) ; presphenoidal from presphenoid (I) + -al
: indicating or relating to a median part of the vertebrate skull anterior to the basisphenoid