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bathythermograph

American  
[bath-uh-thur-muh-graf, -grahf] / ˌbæθ əˈθɜr məˌgræf, -ˌgrɑf /

noun

Oceanography.
  1. an instrument that makes a record of the temperature at various depths in the ocean.


bathythermograph Scientific  
/ băth′ĭ-thûrmə-grăf′ /
  1. A device that records water temperature in relation to ocean depth.


Etymology

Origin of bathythermograph

First recorded in 1935–40; bathy- + thermograph