cohomology
noun
cohomology is spelled C-O-H-O-M-O-L-O-G-Y: 10 letters. It appears about once in every 7 million words in written English, the 80,453rd most frequent word form (wordfreq, 2021 data). As a noun, cohomology means “A method of contravariantly associating a family of invariant quotient groups to each algebraic or geometric object of a category, including…” (English Wiktionary, September 2026). The plural of cohomology is cohomologies.
How many letters and syllables are in cohomology?
| Letters | 10: C-O-H-O-M-O-L-O-G-Y |
|---|---|
| In writing | about once in every 7 million words; the 80,453rd most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is cohomology?
Cohomology appears about once in every 7 million words in written English, the 80,453rd most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Forms of cohomology
- cohomologies plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does cohomology mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A method of contravariantly associating a family of invariant quotient groups to each algebraic or geometric object of a category, including categories of geometric and algebraic objects.
- 2
A system of quotient groups associated to a topological space.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Cohomology in Spanish, French, German and Portuguese
In the sense theory:
| Language | Words |
|---|---|
| German | Kohomologie |
| Portuguese | cohomologia |
| Spanish | cohomología |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does cohomology come from?
From co- + homology.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).