The Collaborative International Dictionary of English v.0.48:
Basilar \Bas"i*lar\, Basilary \Bas"i*la*ry\, a. [F. basilaire, fr. L. basis. See Base, n.] 1. Relating to, or situated at, the base. [1913 Webster] 2. Lower; inferior; applied to impulses or springs of action. [R.] "Basilar instincts." --H. W. Beecher. [1913 Webster]WordNet (r) 3.0 (2006):
basilar adj 1: of or relating to or located at the base; "the basilar membrane of the cochlea" [syn: basilar, basilary]