basilar

adjective

1. pertaining to or situated at the base, especially the base of the skull.
2. basal.

adjective

1. mainly anatomy of or situated at a basebasilar artery Also: basilary (ˈbæsɪlərɪ, -sɪlrɪ)

adj.

1. Of, relating to, or located at or near the base, especially the base of the skull.