DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   arugula \arugula\ n.
      1. an erect European annual (Eruca vesicaria sativa) of the
         mustard family, often grown as a salad crop to be
         harvested when young and tender.
      Syn: rocket, roquette, garden rocket, rocket salad, Eruca
           sativa.
           [WordNet 1.5]