Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The 14th letter of the Greek alphabet.

from The Century Dictionary.

  • noun The Greek letter Ξ, ξ, corresponding to the English x.
  • noun The Greek letter Ξ, ξ, corresponding to the English x and z.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

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

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective being one more than ten
  • noun the cardinal number that is the sum of ten and one
  • noun the 14th letter of the Greek alphabet

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek xei, xī.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek ξεῖ, ξῖ.

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  • The American Heritage® Stedman's Medical Dictionary

    September 29, 2010