[ noun ] the upper angle between an axis and an offshoot such as a branch or leafstalk <noun.plant>
Axil \Ax"il\ ([a^]ks"[i^]l), n. [L. axilla. Cf. {Axle}.] (Bot.) The angle or point of divergence between the upper side of a branch, leaf, or petiole, and the stem or branch from which it springs. --Gray.