The Collaborative International Dictionary of English v.0.48:
Pellicle \Pel"li*cle\, n. [L. pellicula, dim. of pellis skin: cf. F. pellicule.] 1. A thin skin or film. [1913 Webster] 2. (Chem.) A thin film formed on the surface of an evaporating solution. [1913 Webster]WordNet (r) 3.0 (2006):
pellicle n 1: thin protective membrane in some protozoa