Xi

  1. Proper noun.  (surname, common) of east Asian derivation.
  2. Noun.  The name for the 14th letter of Classical and Modern Greek. The 15th in Ancient and Old Greek.
  3. Noun.  (particles) Either of a pair of hyperons having spin 1/2, which decay into a lambda particle and a pion.

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This entry was last updated on RefTopia from its source on 3/20/2012.