The Collaborative International Dictionary
Basisphenoid
Basisphenoid \Ba`si*sphe"noid\, Basisphenoidal \Ba`si*sphe*noid"al\, a. [Basi- + sphenoid.] (Anat.) Of or pertaining to that part of the base of the cranium between the basioccipital and the presphenoid, which usually ossifies separately in the embryo or in the young, and becomes a part of the sphenoid in the adult.
Basisphenoid
Basisphenoid \Ba`si*sphe"noid\, n. (Anat.) The basisphenoid bone.
Wiktionary
basisphenoid
a. (context anatomy English) Of or pertaining to the base of the sphenoid bone, especially to a centre of ossification there in the embryo n. The basisphenoid bone