Definition of aqualung noun from the Oxford Advanced Learner's Dictionary



(also US English Aqualung™) noun
BrE BrE//ˈækwəlʌŋ//
; NAmE NAmE//ˈækwəlʌŋ//
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a piece of breathing equipment that a diver wears on his/her back when swimming underwater See related entries: Diving Word Origin1950s (originally a proprietary name in the US): from Latin aqua ‘water’ + lung.
See the Oxford Advanced American Dictionary entry: aqualung