Plural of sigma
regular plural
The plural of sigma is sigmas or sigmata.
Forms of sigma
| Singular | sigma /ˈsɪɡmə/ |
|---|---|
| Plural | sigmas sigmata |
| Countable | countable |
Sigmas and sigmata in a sentence
- Small sigmata are very rare, and trichodragmata are apparently absent.1932, Records of the Indian Museum, volume 34, page 329. From the entry trichodragma
Meaning of sigma
- noun The eighteenth letter of the Classical and Modern Greek alphabets (Σ, σ), the twentieth letter of Old and Ancient.
- noun The symbol Σ, used to indicate summation of a set or series.
- noun The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.
Questions about the plural of sigma
- What is the plural of sigma?
- The plural of sigma is sigmas or sigmata.
- Which is correct, sigmas or sigmata?
- Both are used. sigmas is the more common of the two in English writing.
- Is sigma countable?
- Sigma is a countable noun.
Source and license
Adapted from Wiktionary: sigma (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.
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