codomain
/ˌkoʊ.doʊˈmeɪn/
"codomain" is a 8-letter English headword indexed on PlainSpell.
The verdict
“codomain” is uncommon English (outside the top frequency list), classed as a noun. 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) - The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y.
Corpus desk
Index EN-codomain · codomain · English
codomain · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 8 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 | codomain |
| Language | English |
| Part of speech | Noun |
| IPA | /ˌkoʊ.doʊˈmeɪn/ |
| Letters | 8 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “codomain” in English
Rare enough to double-check
codomain is uncommon English outside the top frequency list, classed as anoun, transcribed /ˌkoʊ.doʊˈmeɪn/. Rarity is why readers land here mid-draft. 2 senses are on record.
codomain doesn't appear in our generated misspelling index, typically a sign the spelling maps closely to how the word sounds. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From co- + domain. The correct English form is codomain, spelled C-O-D-O-M-A-I-N.
Definition
- 1The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y.
- 2The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y.
Recorded use
Wiktionary examplesThese source excerpts show how codomain appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Definition 2.5. A function is onto if each element of the codomain has at least one element of the domain assigned to it. In other words, a function is onto if the range equals the codomain.
Once we have described f as a function from A to B, by convention we will call B the codomain, even though other sets, of which B is a subset, could have been used.[…]If y is an element of the codomain, then y#92;in#92;mathit#123;Img#125;(f,A) iff there is some x in the domain such that f maps x to y.
Etymology
From co- + domain.
Synonyms
Antonyms
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.