noun a simple gland or glandular cavity; a crypt.
2. follicle ·noun a small mass of adenoid tissue; as, a lymphatic follicle.
3. follicle ·noun a small cavity, tubular depression, or sac; as, a hair follicle.
4. follicle ·noun a simple podlike pericarp which contains several seeds and opens along the inner or ventral suture, as in the peony, larkspur and milkweed.