|veil (vāl) Pronunciation Key
A membranous covering or part, especially a membrane surrounding the young mushrooms of certain basidiomycete fungi. In some species the membrane (called a partial veil) extends only from the stalk to the cap. As the cap expands, the veil breaks, leaving a ring called an annulus on the stalk and often scalelike pieces on the cap. These veil remnants are important for identifying species of mushrooms.