bathysphere

from WordNet (r) 3.0 (2006)

bathysphere
    n 1: spherical deep diving apparatus (lowered by a cable) for
         underwater exploration

from The Collaborative International Dictionary of English v.0.48

bathysphere \bath"y*sphere\ n.
   a spherical deep diving apparatus (lowered by a cable) for
   underwater exploration; it is constructed with a strong steel
   shell to withstand high pressures at the ocean bottom.
   [WordNet 1.5 +PJC]

from Moby Thesaurus II by Grady Ward, 1.0

19 Moby Thesaurus words for "bathysphere":
      Aqua-Lung, air cylinder, aquascope, bathyscaphe, benthoscope,
      diving bell, diving boat, diving chamber, diving goggles,
      diving helmet, diving hood, diving mask, diving suit, periscope,
      scuba, snorkel, submarine, swim fins, wet suit

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