from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A large vessel for underwater work, open on the bottom and supplied with air under pressure.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- 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.
from the GNU version of the Collaborative International Dictionary of English
- adj. 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.
from The Century Dictionary and Cyclopedia
- n. A mechanical contrivance consisting essentially of an inverted cup-shaped or bell-shaped chamber filled with air, in which persons are lowered beneath the surface of the water to perform various operations, such as examining the foundations of bridges, blasting rocks, recovering treasure from sunken vessels, etc.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. diving apparatus for underwater work; has an open bottom and is supplied with compressed air
Sorry, no etymologies found.