0 a brand name for a container of air that you carry on your back while swimming under the surface of the water, with a tube taking air to your mouth or nose to allow you to breathe
Diving suits were the most popular and useful form of diving until the invention in 1945 of the Aqua-Lung by the French engineer Emile Gagnan and the French underwater explorer Jacques Cousteau.
The Aqua-Lung was a tank of air with a mask that allowed divers complete freedom of movement.
