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pump-action

adjective [before noun]
 
 
/ˈpʌmp.æk.ʃən/

Definition

refers to a device that operates by forcing something, especially air, in or out of a closed space or container: a pump-action shotgun a pump-action toiletGenerating and pumping devices
(Definition of pump-action adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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