DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   citrous
       adj 1: of or relating to plants of the genus Citrus; "a citrous
              disease"
       2: of or relating to or producing fruit of the plants of the
          genus Citrus; "the citrus production of Florida"