From Longman Dictionary of Contemporary Englishdiving bellˈdiving bell noun [countable] HEOa metal container that is open at the bottom and filled with air under pressure, in which people can work under water
Examples from the Corpus
diving bell• A ship that loses energy, a diving bell that gains it.• Bookcases, iron safes, furniture from the Old World, a diving bell.• A schedule 6 mixed gas diving bell.• All deep diving beyond 50 metres requires a schedule six diving bell which can carry two or three divers. 