What does "diving" mean?

Diving: That dives or is used or diving. Diving beetle (Zoöl.), any beetle of the family Dytiscidæ, 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.