Source : Webster's Revised Unabridged Dictionary (1913)

Pellicle \Pel"li*cle\, n. [L. pellicu?a, dim. of pellis skin:
   cf. F. pellicule.]
   1. A thin skin or film.

   2. (Chem.) A thin film formed on the surface of an
      evaporating solution.

Source : WordNet®

pellicle
     n : thin protective membrane in some protozoa