[1] : The Collaborative International Dictionary of English v.0.48

patrol wagon \patrol wagon\ n.
   an enclosed truck used by police to transport prisoners.

   syn: paddy wagon, black maria.
        wordnet 1.5

[2] : WordNet (r) 2.0

patrol wagon
     n : van used by police to transport prisoners syn: police van,
          police wagon, paddy wagon, wagon, black maria
see also:
police van police wagon paddy wagon wagon black maria 

Wagon >> W Words
Wagon, definition of term: Wagon
wagon_pag1.html

Patrol >> P Words
Patrol, definition of term: Patrol
patrol_pag1.html

Patrol Boat >> P Words
Patrol Boat, definition of term: Patrol Boat
patrol+boat_pag1.html

Conestoga Wagon >> C Words
Conestoga Wagon, definition of term: Conestoga Wagon
conestoga+wagon_pag1.html

Water Wagon >> W Words
Water Wagon, definition of term: Water Wagon
water+wagon_pag1.html

Station Wagon >> S Words
Station Wagon, definition of term: Station Wagon
station+wagon_pag1.html

Covered Wagon >> C Words
Covered Wagon, definition of term: Covered Wagon
covered+wagon_pag1.html

Border Patrol >> B Words
Border Patrol, definition of term: Border Patrol
border+patrol_pag1.html

Paddy Wagon >> P Words
Paddy Wagon, definition of term: Paddy Wagon
paddy+wagon_pag1.html