The Collaborative International Dictionary
Isothermobath
Isothermobath \I`so*ther"mo*bath\, n. [Iso- + Gr. ? hot + ? depth.] (Phys. Geog) A line drawn through points of equal temperature in a vertical section of the ocean.
Wiktionary
isothermobath
n. A line drawn through points of equal temperature in a vertical section of the ocean.