Category:Pileus

Pi"le*us, n.; pl. Pilei. Etym: [l., a felt cap.]

1. (rom. Antiq.)

Defn: a kind of skull cap of felt.

2. (bot.)

Defn: the expanded upper portion of many of the fungi. See mushroom.

3. (zoöl.)

Defn: the top of the head of a bird, from the bill to the nape.