cotyledon
/ˌkɒt.ɪˈliː.dən/
"cotyledon" is a 9-letter English headword indexed on PlainSpell.
The verdict
“cotyledon” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 9
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Each of the patches of villi on the foetal chorion in the placenta of ruminants and some other mammals.
Corpus desk
Index EN-cotyledon · cotyledon · English
cotyledon · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 9 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "C" 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 | cotyledon |
| Language | English |
| Part of speech | Noun |
| IPA | /ˌkɒt.ɪˈliː.dən/ |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “cotyledon” in English
Rare enough to double-check
cotyledon is uncommon English outside the top frequency list, classed as anoun, transcribed /ˌkɒt.ɪˈliː.dən/. Rarity is why readers land here mid-draft. 2 senses are on record.
cotyledon doesn't appear in our generated misspelling index, which points to an orthography that plays by predictable English rules. No confusable counterpart is on file for this word, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: From Latin cotylēdōn, from Ancient Greek κοτυληδών (kotulēdṓn, “cup-shaped cavity”), from κοτύλη (kotúlē, “cup”). The correct English form is cotyledon, spelled C-O-T-Y-L-E-D-O-N.
Definition
- 1Each of the patches of villi on the foetal chorion in the placenta of ruminants and some other mammals.
- 2The leaf of the embryo of a seed-bearing plant; after germination it becomes the first leaves of the seedling.
Recorded use
Wiktionary exampleThese source excerpts show how cotyledon appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Forced to apply animal findings to humans, his human womb also had cotyledons like a dog's.
Etymology
From Latin cotylēdōn, from Ancient Greek κοτυληδών (kotulēdṓn, “cup-shaped cavity”), from κοτύλη (kotúlē, “cup”).
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.