DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   cos
       n 1: ratio of the adjacent side to the hypotenuse of a right-
            angled triangle [syn: cosine, cos]
       2: lettuce with long dark-green leaves in a loosely packed
          elongated head [syn: cos, cos lettuce, romaine,
          romaine lettuce]