/ Dictionary / Index B bathysphere: Meaning and Definition of Find definitions for: bath•y•sphere Pronunciation: (bath'u-sfēr"), [key] — n. Oceanog. a spherical diving apparatus from which to study deep-sea life, lowered into the ocean depths by a cable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bathysphere (Thesaurus) bathyscaphe bathythermogram Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language