Follicle

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