The Collaborative International Dictionary of English v.0.48:

Pointal \Point"al\, n. [From Point: cf. F. pointal an upright
   wooden prop, OF. pointille a prick or prickle.]
   1. (Bot.) The pistil of a plant.
      [1913 Webster]

   2. A kind of pencil or style used with the tablets of the
      Middle Ages. "A pair of tablets [i. e., tablets] . . . and
      a pointel." --Chaucer.
      [1913 Webster]

   3. (Arch.) See Poyntel. [Obs. or R.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Poyntel \Poyn"tel\, n. [See Pointal.] (Arch.)
   Paving or flooring made of small squares or lozenges set
   diagonally. [Formerly written pointal.]
   [1913 Webster]