scu‧ba div‧ing /ˈskuːbə ˌdaɪvɪŋ/
noun [uncountable][
Date: 1900-2000;
Origin: self-contained underwater breathing apparatus]
the sport of swimming under water while breathing through a tube that is connected to a container of air on your back
—scuba diver noun [countable] [TahlilGaran] Dictionary of Contemporary English ▲