DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   gem
       n 1: art highly prized for its beauty or perfection [syn: gem,
            treasure]
       2: a crystalline rock that can be cut and polished for jewelry;
          "he had the gem set in a ring for his wife"; "she had jewels
          made of all the rarest stones" [syn: gem, gemstone,
          stone]
       3: a person who is as brilliant and precious as a piece of
          jewelry [syn: jewel, gem]
       4: a sweet quick bread baked in a cup-shaped pan [syn: muffin,
          gem]
       5: a precious or semiprecious stone incorporated into a piece of
          jewelry [syn: jewel, gem, precious stone]