[1] : 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
see also:
eruca vesicaria 

Vesicaria >> V Words
Vesicaria, definition of term: Vesicaria
vesicaria_pag1.html

Eruca >> E Words
Eruca, definition of term: Eruca
eruca_pag1.html