From Longman Dictionary of Contemporary EnglishRelated topics: Weaponscanistercan‧is‧ter /ˈkænɪstə $ -ər/ noun [countable]1PMWa round metal case that containsgas and bursts when it is thrown or fired from a gun
Police fired tear gas canisters into the crowd.2CONTAIN/HOLDa metal container for keeping something in
a tea canister
a petrol canisterExamples from the Corpuscanister• canisters of film• Bhutto was choked by tear gas earlier when police fired canisters directly at her open-top jeep.• a flourcanister• Police fired tear-gas canisters at the crowd of protestingstudents.• They met the same tempest of shell, grape, canister, and musketry, and recoiled.• If it is chosen, the undergroundsite could start receivingcanisters of waste in 2010, Olds said.• The exhaust gas is mixed with a little air from a small pump at a point just before it enters the canister.• A seven-year-old child was reportedly hit by one of the canisters and taken, injured in the leg, to hospital.• The canisters were landing in a cornfield about half-a-mile away.Origincanister(1400-1500)Latincanistrum“basket”, from Greekkanastron, from kanna; → CANE1