Xi

Pronunciation

• IPA: /ksaɪ/, /saɪ/, /ksiː/
• Rhymes: -aɪ

Origin

From Ancient Greek ξεῖ, ξῖ.

Full definition of xi

Noun

1. The name for the 14th letter of Classical and Modern Greek. The 15th in Ancient and Old Greek.
2. (particle) Either of a pair of hyperons having spin 1/2, which decay into a lambda particle and a pion.

Derived terms

• xi baryon