Split ring

Split \Split\, a.
   1. Divided; cleft.
      [1913 Webster]

   2. (Bot.) Divided deeply; cleft.
      [1913 Webster]

   3. (Exchanges)
      (a) Divided so as to be done or executed part at one time
          or price and part at another time or price; -- said of
          an order, sale, etc.
      (b) Of quotations, given in sixteenth, quotations in
          eighths being regular; as, 103/16 is a split
          quotation.
      (c) (London Stock Exchange) Designating ordinary stock
          that has been divided into preferred ordinary and
          deferred ordinary.
          [Webster 1913 Suppl.]

   {Split pease}, hulled pease split for making soup, etc.

   {Split pin} (Mach.), a pin with one end split so that it may
      be spread open to secure it in its place.

   {Split pulley}, a parting pulley. See under {Pulley}.

   {Split ring}, a ring with overlapped or interlocked ends
      which may be sprung apart so that objects, as keys, may be
      strung upon the ring or removed from it.

   {Split ticket}, a ballot in which a voter votes for a portion
      of the candidates nominated by one party, candidates of
      other parties being substituted for those omitted. [U.S.]
      [1913 Webster +PJC]