aq ‧ ua ‧ lung /ˈækwəlʌŋ/ BrE AmE noun [countable] trademark British English
a piece of equipment that provides a ↑ diver (=someone who swims underwater) with air, and which they wear on their backs
aq ‧ ua ‧ lung /ˈækwəlʌŋ/ BrE AmE noun [countable] trademark British English
a piece of equipment that provides a ↑ diver (=someone who swims underwater) with air, and which they wear on their backs
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012