PILEI
PILEUS
cap, pileus
(noun) a fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom
Source: WordNet® 3.1
Noun
pilei
plural of pileus
Source: Wiktionary
PILEUS
Pi"le*us, n.; pl. Pilei. Etym: [L., a felt cap.]
1. (Rom. Antiq.)
Definition: A kind of skull cap of felt.
2. (Bot.)
Definition: The expanded upper portion of many of the fungi. See Mushroom.
3. (Zoöl.)
Definition: The top of the head of a bird, from the bill to the nape.
Source: Webster’s Unabridged Dictionary 1913 Edition