pileus

pileus Definition

pi·leus (pī′lē əs, pil′ē-)

noun pl. -·lei′--ī′

a type of brimless cap worn in ancient Rome
Bot. the cap of a mushroom, or the similar part of the fruiting body of other fungi
Zool.
1. the umbrella-shaped disk of a jellyfish
2. pileum

Etymology: < L pilleus (or pilleum), felt cap, akin to pilus, hair: see pile

pileus Usage Examples

Converse of object

wear: He also wears the pileus, the felt cap worn by ex-slaves when they have received their liberty.

Modifies a noun

cloud: The water vapor in it suddenly condenses forming a misty veil-like layer of droplets above the cumulus - pileus cloud.

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