From 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]
From 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]