xi
Spanish, noun/ˈsi/
xi is spelled X-I (2 letters) and appears 17 times per million words in written Spanish, the 4,689th most frequent Spanish word form (wordfreq, 2021 data). Xi is a Spanish feminine noun meaning “xi; the Greek letter Ξ, ξ” (English Wiktionary, September 2026). The Spanish Wiktionary (Wikcionario) defines it as “Decimotercera letra del alfabeto griego (Ξ, ξ), que corresponde a la equis (X, x) del abecedario latino”.
What does xi mean in English?
noun
- 1
femininexi; the Greek letter Ξ, ξ
Source: English Wiktionary, Spanish section, dump of September 2, 2026 (CC BY-SA 4.0).
How Spanish dictionaries define it
noun: 1. Decimotercera letra del alfabeto griego (Ξ, ξ), que corresponde a la equis (X, x) del abecedario latino. 2. Familia de partículas subatómicas que pertenecen al grupo de los hadrones tienen un carga electrica de + 2, + 1 o -1 cargas elementales o son neutras. Son bariones que contienen tres quarks: un quark arriba o abajo y dos quarks más pesados. Se les llama también particula cascada debido a su estado inestable; ellas decaen rápidamente en partículas más ligeras.
The definition in the Spanish Wiktionary (Wikcionario), in Spanish.
Source: Spanish Wiktionary (Wikcionario), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of xi
- xíes plural
Source: English Wiktionary and Spanish Wiktionary (Wikcionario) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce xi?
- /ˈsi/
- [ˈsi]
Sources: English Wiktionary, Spanish Wiktionary (Wikcionario) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
English words that translate to xi
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is xi in Spanish?
xi appears 17 times per million words in written Spanish.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).