DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   particulate
       adj 1: composed of distinct particles [ant: nonparticulate]
       n 1: a small discrete mass of solid or liquid matter that
            remains individually dispersed in gas or liquid emissions
            (usually considered to be an atmospheric pollutant) [syn:
            particulate, particulate matter]