bathysphere

n.
A spherical deep-diving chamber in which persons are lowered by a cable to study the oceans and deep-sea life.

[ܒbæthǝܖsfir]

ˈbæthǝܖsfir n. a manned spherical chamber for deep-sea observation, lowered by cable from a ship.

Etymology: 1930s: from Greek bathus ‘deep’ + sphere.

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The noun has one meaning:

Meaning #1: spherical deep diving apparatus (lowered by a cable) for underwater exploration

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