xi

noun2

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

noun2

1. •
   A football (soccer) team of eleven players.
2. •
   A cricket team of eleven players.

noun1

1. •
   Capital Greek letter Ξ (X)