pileus
/ˈpɪliəs/
"pileus" is a 6-letter English headword indexed on PlainSpell.
The verdict
“pileus” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 6
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The cap of a mushroom.
Corpus desk
Index EN-pileus · pileus · English
pileus · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 6 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "P" thin
- PHOTO-UNK Peer pending
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
| Property | Value |
|---|---|
| Headword | pileus |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈpɪliəs/ |
| Letters | 6 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “pileus” in English
Rare enough to double-check
pileus is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈpɪliəs/. Rarity is why readers land here mid-draft. 5 senses are on record.
pileus has no tracked misspelling variants, suggesting the orthography follows predictable English patterns. This entry stands alone in our confusable dataset, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: Borrowed from Latin pīleus, a form of pilleus (“a felt cap”). The correct English form is pileus, spelled P-I-L-E-U-S.
Definition
- 1The cap of a mushroom.
- 2The bell of a jellyfish.
- 3A small thin cloud attached to a cumulus cloud.
- 4A conical felt hat worn in Ancient Rome and Greece.
- 5The top of the head of a bird, from the bill to the nape.
Recorded use
Wiktionary examplesThese source excerpts show how pileus appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The stem is easily separable from the pileus at its junction, in this respect being similar to Amanita, Amanitopsis, Lepiota and others.
One must check the size and shape of the pileus as well as its color. Many weird and unexpected shapes are found in the mushroom kingdom.
Etymology
Borrowed from Latin pīleus, a form of pilleus (“a felt cap”).
This word in other languages
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.