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Classic usage
Pronunciation: /ˈbæθɪˌsfɪə(ɹ)/
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From bathy- + -sphere. A genericization from the particular bathysphere in the 1930s named Bathysphere. The name bathysphere was coined decades after the introduction of the device in the 1890s.
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tap / space
Classic usage
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