locket

/หˆlษ‘kษชt/
noun
  1. 1

    A pendant that opens to reveal a space used for storing a photograph or other small item.

  2. 2

    The upper metallic cap of a swordโ€™s scabbard.

  3. 3

    A small white marking on a cat's coat.

Source: https://en.wiktionary.org/wiki/locket