DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   sallow
       adj 1: unhealthy looking [syn: sallow, sickly]
       n 1: any of several Old World shrubby broad-leaved willows
            having large catkins; some are important sources for
            tanbark and charcoal
       v 1: cause to become sallow; "The illness has sallowed her face"