bathysphere

Definition from Wiktionary, a free dictionary

[edit] English

[edit] Etymology

From Ancient Greek βάθος (bathos), “‘depths’”) + σφαίρα (sfaíra), “‘sphere’”).

[edit] Noun

Wikipedia

bathysphere (plural bathyspheres)

1. A spherical steel deep-diving chamber with perspex windows, in which persons are lowered to the depths by a cable to study the oceans and deep-sea life; the precursor to the bathyscaphe