sigma
Portuguese, noun/ˈsi.ɡi.mɐ/
sigma is spelled S-I-G-M-A (5 letters) and appears 1.5 times per million words in written Portuguese, the 26,665th most frequent Portuguese word form (wordfreq, 2021 data). Sigma is a Portuguese masculine noun meaning “sigma (name of the Greek letter Σ, σ)” (English Wiktionary, September 2026). The Portuguese Wiktionary (Wikcionário) defines it as “décima oitava letra do alfabeto grego (Σ, σ [final: ς])”.
What does sigma mean in English?
noun
- 1
masculinesigma (name of the Greek letter Σ, σ)
Source: English Wiktionary, Portuguese section, dump of September 2, 2026 (CC BY-SA 4.0).
How Portuguese dictionaries define it
noun: 1. décima oitava letra do alfabeto grego (Σ, σ [final: ς])
The definition in the Portuguese Wiktionary (Wikcionário), in Portuguese.
Source: Portuguese Wiktionary (Wikcionário), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of sigma
- sigmas plural
Source: English Wiktionary and Portuguese Wiktionary (Wikcionário) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce sigma?
- Brazil /ˈsi.ɡi.mɐ/
- Brazil /ˈsiɡ.mɐ/
- Portugal /ˈsiɡ.mɐ/
Sources: English Wiktionary, Portuguese Wiktionary (Wikcionário) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
English words that translate to sigma
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is sigma in Portuguese?
sigma appears 1.5 times per million words in written Portuguese.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).