an apparatus used in skindiving, consisting of a cylinder or cylinders containing compressed air attached to a breathing apparatus
b.
(as modifier)
scuba diving
Word origin
C20: from the initials of self-contained underwater breathing apparatus
scuba in American English
(ˈskubə)
US
noun
equipment worn by divers for breathing underwater, consisting typically of one or two compressed-air tanks strapped to the back and connected by a hose to a mouthpiece