zone-piecehttp://www.oed.com/dictionary/zone-piece_n%3Ftab%3Dmeaning_and_usezone-piece, n.
First published 1921; not fully revised

zone-piecenoun

  1. 1795–
    1. 1795
      A zone-piece, to point out the required limits of the intended zones.
      W. Herschel in Philosophical Transactions (Royal Society) vol. 85 385

Originally published as part of the entry for zone, n.

zone, n. was first published in 1921; not fully revised.