aqualung(n = noun.artifact) aqua-lung, scuba - a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus;
aqualung, n. & v.
--n. a portable breathing-apparatus for divers, consisting of cylinders of compressed air strapped on the back, feeding air automatically through a mask or mouthpiece.
--v.intr. use an aqualung.