chorion
/ˈkɔɹiɑn/
"chorion" is a 7-letter English headword indexed on PlainSpell.
The verdict
“chorion” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 7
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
Corpus desk
Index EN-chorion · chorion · English
chorion · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 7 letters
- VOW-3 3 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 | chorion |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈkɔɹiɑn/ |
| Letters | 7 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “chorion” in English
Rare enough to double-check
chorion is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈkɔɹiɑn/. Rarity is why readers land here mid-draft. 3 senses are on record.
Our edit-distance generator produced no likely misspellings for chorion, a sign its spelling follows regular English conventions. Our dataset records no confusable match here, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From Late Latin chorion, from Ancient Greek χόριον (khórion, “membrane surrounding the fetus, afterbirth”). The correct English form is chorion, spelled C-H-O-R-I-O-N.
Definition
- 1The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
- 2The outer case of an insect egg.
- 3The outer membrane of seeds of plants.
Recorded use
Wiktionary examplesThese source excerpts show how chorion appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
2002, Rovert E. A. Stewart, Barbara E. Stewart, Female Reproductive Systems, entry in Encyclopedia of Marine Mammals, page 425, The allantois fuses with the chorion, forming a small round area, the allentochorion. This region becomes the placenta (Fig. 3).
In this illustration, some license is taken, since the amnion is shown as still separate from the chorion; this is done to illustrate the process of apposition of the amniotic sac to the chorion and to accentuate the interposition of the yolk sac between the amnion and the chorion.
Etymology
From Late Latin chorion, from Ancient Greek χόριον (khórion, “membrane surrounding the fetus, afterbirth”).
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.