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pi•le•us



Pronunciation: (pī'lē-us, pil'ē-), [key]
n.,
pl. pi•le•iPronunciation: (pī'lē-ī", pil'ē-ī") [key] for 1, 2, 4, pi•le•us for 3.

1. Mycol.the horizontal portion of a mushroom, bearing gills, tubes, etc., on its underside; a cap. See diag. under mushroom.
2. Zool.
a. the umbrella or bell of a jellyfish.
b. pileum.
3. Also called cap cloud, scarf cloud. Meteorol.a small, thin cloud just above or attached to a growing cumulus cloud.
4. a felt skullcap worn by the ancient Romans and Greeks.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

pileuppilewort
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