D defs.my
Entry 2 senses Webster, 1913

Backpiece

· Back·piece · IPA
01 n. A piece, or plate which forms the back of anything, or which covers the back.
  1. 1.
    A piece, or plate which forms the back of anything, or which covers the back.
  2. 2.
    A piece of plate armor protecting the back; -- it is worn as part of a cuirass.