pileus piles • pileweed · · · Info · Definitions · Synonyms · Characters · · pileus · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom. Synonyms: cap. · · Noun Definition 1 Synonyms · · · cap · · Synonym 1 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C p latin small letter p U+0070 s latin small letter s U+0073 u latin small letter u U+0075