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Webster 1913 Edition

Pileus

Pi′le-us

,

Noun.

;

pl.

Pilei

(#)

.

[L., a felt cap.]

1.

(Rom. Antiq.)

A kind of skull cap of felt.

2.

(Bot.)

The expanded upper portion of many of the fungi. See

.

3.

(Zool.)

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