pileus.
The cap of a mushroom.
Meaning & usage
The cap of a mushroom.
The bell of a jellyfish.
A small thin cloud attached to a cumulus cloud.
A conical felt hat worn in Ancient Rome and Greece.
The top of the head of a bird, from the bill to the nape.
Where this word comes from
Borrowed from Latin pīleus, a form of pilleus (“a felt cap”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.