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Meaning of bathythermograph

bath•y•ther•mo•graph

Pronunciation: (bath"u-thûr'mu-graf", -gräf"), [key]
— n. Oceanog.
  1. an instrument that makes a record of the temperature at various depths in the ocean.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.