pileus

Found in Anh - Anh (Wordnet)

Definition Noun 1. The cap of a mushroom or other fungus : The pileus is the umbrella- or cone-shaped, often fleshy, top part of a fungus that bears the spore-producing surfaces (gills, pores, or teeth) on its underside. Usage The term pileus is a specialized, scientific term used primarily in mycology (the study of fungi). It is the formal name for the structure commonly called the "cap" of a...