Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Diving \Div"ing\, a. That dives or is used or diving.
Diving beetle (Zo["o]l.), any beetle of the family Dytiscid[ae], which habitually lives under water; -- called also water tiger.
Diving bell, a hollow inverted vessel, sometimes bell-shaped, in which men may descend and work under water, respiration being sustained by the compressed air at the top, by fresh air pumped in through a tube from above.
Diving dress. See Submarine armor, under Submarine.
Diving stone, a kind of jasper.
Wiktionary
alt. An airtight chamber, open at the bottom, that is lowered on a cable underwater to operate as a base or a means of transport for a diver or a small number of divers. n. An airtight chamber, open at the bottom, that is lowered on a cable underwater to operate as a base or a means of transport for a diver or a small number of divers.
WordNet
n. diving apparatus for underwater work; has an open bottom and is supplied with compressed air
Wikipedia
A diving bell is a rigid chamber used to transport divers to depth in the ocean. The most common types are the wet bell and the closed bell.
The wet bell is a cable-suspended chamber, open at the bottom like a moon pool structure, that is lowered underwater to operate as a base or a means of transport for a small number of divers. The pressure of the water keeps the air trapped inside the bell. They were the first type of diving chamber. Unlike a submarine, the diving bell is not designed to move under the control of its occupants, nor to operate independently of its tether.
The closed bell is a sealed chamber, which may be used for mixed gas bounce diving and for saturation diving. This form of bell locks on and off the chamber where the divers live, by way of a closed door sealing the divers in at pressure. Once on the surface, the bell is mated with the chamber system and the space in between is pressurized to enable the divers to make a seal and transfer through to the chamber which is at the same pressure. In saturation diving the bell is merely the ride to and from the job, and the chamber is the living quarters. If the dive is relatively short (a bounce dive), decompression can be done in the bell in exactly the same way it would be done in the chamber.