pileus
Americannoun
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Mycology. the horizontal portion of a mushroom, bearing gills, tubes, etc., on its underside; a cap.
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Zoology.
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the umbrella or bell of a jellyfish.
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Also called cap cloud. Also called scarf cloud. Meteorology. a small, thin cloud just above or attached to a growing cumulus cloud.
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a felt skullcap worn by the ancient Romans and Greeks.
noun
Other Word Forms
Noun Inflected Forms
Etymology
Origin of pileus
1750–60; < New Latin, special use of Latin pīleus skullcap; akin to Greek pîlos felt, felt cap
Vocabulary lists containing pileus
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
This species is unique for the dorsal attachment of its stipe to the top of the pileus, and the abundant cystidia covering all surfaces of the fruiting body.
From Salon ● Apr. 26, 2025
The reverse features two daggers on either side of a cap known as a pileus.
From New York Times ● Mar. 22, 2023
A cumulus, for example, might just be a cumulus; or it might be a cumulus fractus, if its edges are tattered; or a cumulus pileus, if a smaller cloud appears over it like a hood.
From New York Times ● May 4, 2016
P. 1-1.5 cm. resupinate, then reflexed, tomentose, white, attached by a very short incurved downy stem which disappears when the pileus turns over; g. radiating from an excentric point, distant, white then pink; sp.
From European Fungus Flora: Agaricaceae by Massee, George
Stem fleshy, fibrous externally; pileus fibrillose or scaly; gills sinuato-adnexed.
From European Fungus Flora: Agaricaceae by Massee, George
From the thirteenth century onwards pilei, and the overtopping tufts, were of various colours according to the faculties which it was intended to distinguish.
From The Customs of Old England by Snell, F. J. (Frederick John)
The flesh was somewhat lighter in color than the outside pilei, which extended horizontally from the tubercle.
From The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth by Hard, Miron Elisha
The pilei are pulvinate, narrow, zoned, often laterally confluent; ochraceous-white, tomentose, then smooth, laccate.
From The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth by Hard, Miron Elisha
Their radiately cracked pilei, with the inner substance showing yellow through the cracks, will help to distinguish the species.
From The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth by Hard, Miron Elisha
Figure 375 represents one of the pilei showing the spines.
From The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth by Hard, Miron Elisha
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
