Preferred term

Parchment

Definition

Translucent or opaque material made from calf, sheep, or goat skin which has been limed, dehaired, scraped, and dried under tension to produce a thin, strong material for writing, bookbinding, or other uses. For finer quality calf parchment, use "vellum." The terms parchment and vellum sometimes have been and still are both confused and used interchangeably.