Bot. [ad. L. axilla: see below; cf. mod.F. axille.] The upper angle between a leaf or petiole and the stem from which it springs; also that between a branch and the trunk.
1794. Martyn, Rousseaus Bot., v. 50. Branches which grow from their alæ or axils.
1872. H. Macmillan, True Vine, v. 210. The buds of plants almost always grow in the axil.