grail

  1. Noun.  The Holy Grail.
  2. Noun.  The object of an extended or difficult quest.[http://www.merriam-webster.com/dictionary/grail].
  3. Noun.  GRAIL mission, an acronym for ''Gravity Recovery and Interior Laboratory'', a pair of NASA spacecraft sent to the moon to measure its gravity field.
  4. Noun.  A book of offices in the Roman Catholic Church; a gradual.
  5. Noun.  (poetic) Small particles of earth; gravel.

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