DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   ETD
       n 1: a system for screening luggage in airports; an agent passes
            a swab around or inside luggage and then runs the swab
            through a machine that can detect trace amounts of
            explosives [syn: explosive trace detection, ETD]