Source : Webster's Revised Unabridged Dictionary (1913)

Quartern \Quar"tern\, n.[OE. quarteroun, quartron, F. quarteron,
   the fourth part of a pound, or of a hundred; cf. L.
   quartarius a fourth part, quarter of any measure, quartern,
   gill. See {Quarter}, and cf. {Quarteron}, {Quadroon}.]
   1. A quarter. Specifically:
      (a) The fourth part of a pint; a gill.
      (b) The fourth part of a peck, or of a stone (14 ibs.).

   2. A loaf of bread weighing about four pounds; -- called also
      {quartern loaf}. --Simmonds.