Standard Lemma guide

pileus

noun · 6 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • /ˈpɪliəs/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -ɪliəs
  • homophone: pileous

1

noun

Meaning 1

The cap of a mushroom.

Definition source: English Wiktionary via Wiktextract

Topics: biology, mycology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The bell of a jellyfish.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A small thin cloud attached to a cumulus cloud.

Definition source: English Wiktionary via Wiktextract

Topics: climatology, meteorology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: cap cloud, scarf cloud

Antonyms: none provided

Broader terms: accessory cloud

4

noun

Meaning 4

A conical felt hat worn in Ancient Rome and Greece.

Definition source: English Wiktionary via Wiktextract

Usage: Ancient-Rome, historical

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

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

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: pileum, crown

Antonyms: none provided

6

noun

Meaning 6

a fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: cap

Antonyms: none provided

Broader terms: plant part, plant structure

History

Etymology

Borrowed from Latin pīleus, a form of pilleus (“a felt cap”).

Across languages

Translations

53 source translations are retained for this English entry.

  • Basque: pileo — the cap of a mushroom
  • Bulgarian: гугла (gugla) — the cap of a mushroom
  • Catalan: pili — the cap of a mushroom
  • Catalan: píleu — the cap of a mushroom
  • Chinese Mandarin: 菌蓋 /菌盖 (jùngài) — the cap of a mushroom
  • Czech: klobouk — the cap of a mushroom
  • Estonian: kübar — the cap of a mushroom
  • Estonian: seenekübar — the cap of a mushroom
  • French: pileus — the cap of a mushroom
  • Galician: píleo — the cap of a mushroom
  • German: Hut — the cap of a mushroom
  • Greek: πιλίδιο (pilídio) — the cap of a mushroom
  • Hungarian: kalap — the cap of a mushroom
  • Icelandic: svepphattur — the cap of a mushroom
  • Icelandic: hattur — the cap of a mushroom
  • Italian: pileo — the cap of a mushroom
  • Japanese: 傘 (kasa) — the cap of a mushroom
  • Korean: 버섯갓 (beoseot-gat) — the cap of a mushroom
  • Polish: kapelusz — the cap of a mushroom
  • Portuguese: píleo — the cap of a mushroom
  • Russian: шля́пка (šljápka) — the cap of a mushroom
  • Serbo-Croatian: klobuk — the cap of a mushroom
  • Spanish: píleo — the cap of a mushroom
  • Spanish: sombrerillo — the cap of a mushroom
  • Spanish: sombrerete — the cap of a mushroom
  • Swedish: hatt — the cap of a mushroom
  • Ukrainian: шляпка (šljapka) — the cap of a mushroom
  • Ukrainian: шапинка (šapynka) — the cap of a mushroom
  • Catalan: píleu — small cloud
  • French: pileus — small cloud
  • Galician: píleo — small cloud
  • German: Pileus — small cloud
  • Icelandic: skýjahetta — small cloud
  • Japanese: 頭巾雲 (zukingumo) — small cloud
  • Korean: 필레우스 (pille'useu) — small cloud
  • Polish: pileus — small cloud
  • Spanish: píleo — small cloud
  • Albanian: plisi — felt hat worn in ancient Rome and Greece
  • Catalan: pili — felt hat worn in ancient Rome and Greece
  • Czech: pileus — felt hat worn in ancient Rome and Greece
  • French: pileus — felt hat worn in ancient Rome and Greece
  • Galician: píleo — felt hat worn in ancient Rome and Greece
  • German: Pileus — felt hat worn in ancient Rome and Greece
  • Greek: πίλος (pílos) — felt hat worn in ancient Rome and Greece
  • Ancient Greek: πῖλος (pîlos) — felt hat worn in ancient Rome and Greece
  • Italian: pileo — felt hat worn in ancient Rome and Greece
  • Korean: 필레우스 (pille'useu) — felt hat worn in ancient Rome and Greece
  • Lithuanian: pilosas — felt hat worn in ancient Rome and Greece
  • Polish: pilos — felt hat worn in ancient Rome and Greece
  • Portuguese: píleo — felt hat worn in ancient Rome and Greece
  • Russian: пилос (pilos) — felt hat worn in ancient Rome and Greece
  • Spanish: píleo — felt hat worn in ancient Rome and Greece
  • Turkish: pilos — felt hat worn in ancient Rome and Greece