tail·piece /ˈte(ə)lˌpis/
  末片,附屬物,補白圖片
  Tail·piece n.
  1. A piece at the end; an appendage.
  2. Arch. One of the timbers which tail into a header, in floor framing. See Illust. of Header.
  3. Print. An ornament placed at the bottom of a short page to fill up the space, or at the end of a book.
  4. A piece of ebony or other material attached to the lower end of a violin or similar instrument, to which the strings are fastened.
  5. Locks A piece for transmitting motion from the hub of a lock to the latch bolt.
  6.  The part of a telescope containing the adjusting device for the eyepiece, etc.
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  tailpiece
       n : appendage added to extend the length of something