obstruction of the circulatory system caused by an air bubble as, e.g., accidentally during surgery or hypodermic injection or as a complication from scuba diving

skin diving with scuba apparatus

a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus, A portable apparatus having a container with compressed air, a regulator that is equipped with a mouthpiece and adjusts the pressure of the released air to match the surrounding pressure, and often a buoyancy compensator, used for breathing under water, An apparatus carried by a diver, which includes a tank holding a mixture of oxygen and other gases, used for breathing underwater, verb_ rare To perform scuba diving