Lid

n.
  1. That which covers the opening of a vessel or box, etc.; a movable cover; as, the lid of a chest or trunk.
  2. The cover of the eye; an eyelid.
    1. The cover of the spore cases of mosses.
    2. A calyx which separates from the flower, and falls off in a single piece, as in the Australian Eucalypti.
    3. The top of an ovary which opens transversely, as in the fruit of the purslane and the tree which yields Brazil nuts.