bathyscaphe

noun
bathy·​scaphe | \ ˈba-thi-ˌskaf How to pronounce bathyscaphe (audio) , -ˌskāf\
variants: or bathyscaph \ ˈba-​thi-​ˌskaf How to pronounce bathyscaph (audio) \

Definition of bathyscaphe

: a navigable submersible for deep-sea exploration having a spherical watertight cabin attached to its underside

First Known Use of bathyscaphe

1947, in the meaning defined above

History and Etymology for bathyscaphe

borrowed from French bathyscaphe, from bathy- bathy- + Greek skáphos "hull of a ship, ship"

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The first known use of bathyscaphe was in 1947

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Britannica.com: Encyclopedia article about bathyscaphe

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