1. The hollow area under the arm where the arm joins the shoulder; the armpit.
Usage: Anatomy term; formal/medical usage

Examples

• The doctor examined the patient's axilla for swollen lymph nodes.
• Sweat glands in the axilla produce more perspiration during exercise.
• The axilla is a region rich in blood vessels and nerves.
• Temperature can be measured in the axilla using a thermometer.
• Hair growth in the axilla typically begins during puberty.