AX'IL, noun [Latin axilla; Heb. to separate or set apart; whence armpits.] 1. The armpit; a cavity under the upper part of the arm or shoulder. 2. In botany, the space or angle formed by a branch with the stem, or by a leaf with the stem or branch.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI