subclavian

from WordNet (r) 3.0 (2006)

subclavian
    adj 1: situated beneath the clavicle

from The Collaborative International Dictionary of English v.0.48

Subclavian \Sub*cla"vi*an\, a. [Pref. sub- + L. clavis a key.
   See {Clavicle}.] (Anat.)
   Situated under the clavicle, or collar bone; as, the
   subclavian arteries.
   [1913 Webster]