• (n.) The basisphenoid bone. • (a.) Alt. of Basisphenoidal
(ba″sĭ-sfe´noid) pertaining to the basisphenoid bone.
the median ventral bone lying between the auditory bullae anterior to the basioccipital.
Ba`si·sphe'noid noun (Anat.) The basisphenoid bone. 
Type: Term Pronunciation: bā′si-sfē′noyd Definitions: 1. Relating to the base or body of the sphenoid bone; denoting the independent center of ossification in the embryo that forms the posterior portion of the body of the sphenoid bone. Synonyms: basisphenoid bone