coplanar
/kəʊˈpleɪnə(ɹ)/
"coplanar" is a 8-letter English headword indexed on PlainSpell.
The verdict
“coplanar” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Within the same plane.
Corpus desk
Index EN-coplanar · coplanar · English
coplanar · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 8 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 | coplanar |
| Language | English |
| Part of speech | Adjective |
| IPA | /kəʊˈpleɪnə(ɹ)/ |
| Letters | 8 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “coplanar” in English
Rare enough to double-check
coplanar is uncommon English outside the top frequency list, classed as anadjective, transcribed /kəʊˈpleɪnə(ɹ)/. Rarity is why readers land here mid-draft. 2 senses are on record.
No generated misspelling entries exist for coplanar in our index, a sign its spelling follows regular English conventions. 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 co- + planar. The correct English form is coplanar, spelled C-O-P-L-A-N-A-R.
Definition
- 1Within the same plane.
- 2Orbiting a central celestial object within the same orbital plane.
Recorded use
Wiktionary exampleThese source excerpts show how coplanar appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Gliese 876’s third, innermost planet . . . is likely to be coplanar with its outer two companions.
Etymology
From co- + planar.
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.