• (a.) Of or pertaining to an isobathytherm; possessing or indicating the same temperature at the same depth.
I`so·bath'y·ther'mic adjective Of or pertaining to an isobathytherm; possessing or indicating the same temperature at the same depth. 
isobathythermic, isobathythermal A reference to a line connecting points having the same temperature in a vertical section of any part of the sea (also isothermobath).