What does pellicle mean?
A pellicle is an exceptionally thin film, membrane, or layer that covers a surface. The term is especially useful in scientific and technical writing, where it distinguishes a delicate coating or membrane from a thicker layer, crust, or shell. A pellicle may form naturally on a liquid, develop across a biological surface, or be produced deliberately during a chemical or industrial process. Its thinness is central to the word's meaning: the ordinary word film captures part of this idea, while membrane suggests something more substantial and often permeable. The plural pellicles is used when discussing multiple thin surface layers. Although pellicle is relatively uncommon in everyday speech, it is a precise term for delicate films encountered in medicine, microscopy, microbiology, chemistry, and materials science. It can also refer more narrowly to an animal's cast-off skin, but that sense is now largely literary or historical.
A very thin film, membrane, or layer of material forming on or covering a surface.
"The yeast developed a thin pellicle across the surface of the liquid."
Common in biology, medicine, chemistry, and materials science; less usual in general prose.
The cast-off skin or hide of an animal.
"The trapper pulled the warm pellicle from the animal's back."
This sense is uncommon and tends to occur in literary, historical, or specialist contexts.
Used when referring to multiple thin films, membranes, or layers; the plural is standard in technical writing but uncommon in everyday use.
"Several thin pellicles formed along the edges of the dish."
Literally a “little skin,” a pellicle is the word for a film so thin that it seems almost less substantial than a membrane.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does pellicle come from?
Pellicle was borrowed from Latin pellicula, a diminutive of pellis, meaning “skin” or “hide.” The diminutive form thus originally conveyed the sense of a small or thin skin. Its modern English use developed particularly in scientific contexts to denote delicate films and membranes.
Related word forms
How pellicle is actually used
The word is most common in technical contexts, including biology, medicine, chemistry, and materials science. Outside those fields, its use can sound formal or dated.