Pertaining the pyramid-shaped space forming the underside of the shoulder between the upper arm and the side of the chest: Jesse was being examined by Dr. Clegg to determine if there was an infection in the axillary nerves, or in the blood and lymphatic vessels of his armpit.

The axillary section of the subclavian (under the collarbone) artery that distributes blood to the axilla, chest, shoulder, and upper extremities.

An inflamed swelling of lymph nodes in the areas of the armpits, neck, and other bodily parts: Dr. Roberts told Tony's cousin that his axillary bubo, or painfully enlarged lymph nodes, was probably a result of bubonic plague that is usually transmitted by the bite of fleas, probably from an infected rat, during his travels in Africa.

The hollow spaces under the arms of people where they are joined to the shoulder: When Tim was studying basic anatomy in his high school, he learned that axillary cavities are medical terms for the armpits.

The surgical removal of lymph nodes in the armpits: Axillary dissections are performed through an incision in the axilla or as part of a modified radical mastectomy for women with invasive breast cancer.

The flat band of tissue below the skin that covers tissues, separates different layers of tissue, and encloses muscles: Axillary fascia forms the basic area of the axilla or the underarm area.

The small hollows under the arms where they join the body at the shoulder: Jill and Kay were up to their axillary fossae, or almost up to their stretched out arms, in water."

Any of numerous nodes (collections of tissue) situated in the areas of underarm veins that receive lymphatic drainage (almost colorless fluid that travels through vessels and carries cells that help fight infection and disease) from the upper limb, pectoral girdle (bones supporting the front or upper parts of the body), and mammary gland (two half-moon-shaped glands on either side of the adult female chest, which make up the breast): Jenny's primary physician, Dr. Smith, tried to explain how the axillary glands function and how this might explain why she was having an abnormal feeling in her armpits.

The nerves in the armpits: Some of the fibers of the axillary nerves supply the capsules that surround the shoulder joints with connective tissue.

When Sally's little brother tickled her axillary nerves, she couldn't keep herself from laughing and, after a while, it started to be painful to laugh so much!

The area of the upper chest surrounding the armpits which are lateral (to the side) of the pectoral (breast or chest) region: Viola had her axillary regions checked by Dr. Jones to see if there was any indication of cancer in that part of her body.

The body heat as recorded by a thermometer placed in the armpit: Kelvin had his axillary temperature measured by his doctor and the reading was normal in that it was .75 degrees Fahrenheit which was less than his oral (mouth) temperature.

The large vein passing through the armpit which is continuous with the basilica vein (below) and the subclavian vein (above): The axillary veins supply both sides of the body's three muscles; deltoid (a muscle of the shoulder), trees minor (one of the rotator cuff muscles) and the long head of the triceps brachia (an elbow extensor).