csi
Portuguese, noun/ˈksi/
csi is spelled C-S-I (3 letters) and appears 1.9 times per million words in written Portuguese, the 22,561st most frequent Portuguese word form (wordfreq, 2021 data). Csi is a Portuguese masculine noun meaning “xi (Greek letter)” (English Wiktionary, September 2026). The Portuguese Wiktionary (Wikcionário) defines it as “décima quarta letra do alfabeto grego (Ξ, ξ)”.
What does csi mean in English?
noun
- 1
masculinexi (Greek letter)
Source: English Wiktionary, Portuguese section, dump of September 2, 2026 (CC BY-SA 4.0).
How Portuguese dictionaries define it
noun: 1. décima quarta letra do alfabeto grego (Ξ, ξ)
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 csi
- csis plural
- xi alternative
Source: English Wiktionary and Portuguese Wiktionary (Wikcionário) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce csi?
- Brazil /ˈksi/
- Portugal /ˈksi/
Sources: English Wiktionary, Portuguese Wiktionary (Wikcionário) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
English words that translate to csi
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is csi in Portuguese?
csi appears 1.9 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).