From The Collaborative International Dictionary of English v.0.48 :
Axillary \Ax"il*la*ry\ ([a^]ks"[i^]l*l[asl]*r[y^]), a. [See Axil.] 1. (Anat.) Of or pertaining to the axilla or armpit; as, axillary gland, artery, nerve. [1913 Webster] 2. (Bot.) Situated in, or rising from, an axil; of or pertaining to an axil. "Axillary buds." --Gray. [1913 Webster]From WordNet (r) 3.0 (2006) :
axillary adj 1: of or relating to the axil [syn: axillary, alar] 2: of or relating to the armpit; "axillary gland"