iso·bathy·therm \ˌ ̷ ̷ ̷ ̷ˈbathə̇ˌthərm\noun Etymology:is- + bathy- + -therm : a line connecting points on the earth's surface where a certain temperature is found at the same depth • iso·bathy·ther·mal\| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷|thərməl\oriso·bathy·ther·mic\-mik\adjective