axillary axillary axillary means "related to the axilla (armpit)" or "related to the leaf axils". look up axillary in wiktionary, the free dictionary. "axillary" may refer to: biology axillary artery axillary border axillary fascia axillary feathers axillary hairs axillary lines axillary lymph nodes axillary nerve axillary process axillary sheath axillary space axillary tail axillary vein axillary (botany), of a flower or other structure found in a leaf axil