1. a hose (carried on a truck) that fires water under high pressure to disperse crowds (especially crowds of rioters); [syn: water cannon, watercannon]
WordNet (r) 3.0 (2006):
water cannon
n 1: a hose (carried on a truck) that fires water under high
pressure to disperse crowds (especially crowds of rioters)
[syn: water cannon, watercannon]