Source : Webster's Revised Unabridged Dictionary (1913)

Watchet \Watchet\ (-[e^]t), a. [Probably from F. vaciet
   bilberry, whortleberry; cf. L. vaccinium blueberry,
   whortleberry.]
   Pale or light blue. [Obs.] ``Watchet mantles.'' --Spenser.

         Who stares in Germany at watchet eyes?   --Dryden.