noun Download 🔗Share The 14th letter of Classical and Modern Greek. The 15th in Ancient and Old Greek. Examples : "In my Greek alphabet practice, I always mix up xi (Ξ, ξ) with psi (Ψ, ψ) because they look similar. " language writing character linguistics Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share Either of a pair of hyperons having spin 1/2, which decay into a lambda particle and a pion. Examples : "After its creation in the high-energy collision, the xi quickly decayed into a lambda particle and a pion. " physics element Chat with AIVocabulary GamePractice Reading
