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isobathytherm

[ahy-suh-bath-uh-thurm]
noun
  1. a line on a chart or diagram of a body of water, connecting depths having the same temperature.
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Origin of isobathytherm

First recorded in 1875–80; iso- + bathy- + therm
Related formsi·so·bath·y·ther·mal, i·so·bath·y·ther·mic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018