isobathytherm

[ahy-suh-bath-uh-thurm]

noun

a line on a chart or diagram of a body of water, connecting depths having the same temperature.

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. 2019