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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.
[s(elf-)c(ontained) u(nderwater) b(reathing) a(pparatus).]
(Swimming, Water Sports & Surfing)
a. an apparatus used in skindiving, consisting of a cylinder or cylinders containing compressed air attached to a breathing apparatus
b. (as modifier): scuba diving.
[C20: from the initials of self-contained underwater breathing apparatus]
n., pl. -bas, n.
1. a portable breathing device for free-swimming divers, consisting of a mouthpiece joined by hoses to one or two tanks of compressed air that are strapped on the back.v.i.
2. to scuba-dive.
[1950–55; s(elf)-c(ontained) u(nderwater) b(reathing) a(pparatus)]
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|Noun||1.||scuba - a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus|
breathing apparatus, breathing device, breathing machine, ventilator - a device that facilitates breathing in cases of respiratory failure
cylinder - a cylindrical container for oxygen or compressed air
oxygen mask - a breathing device that is placed over the mouth and nose; supplies oxygen from an attached storage tank