hypothermal

[ hahy-puh-thur-muh l ]
/ ˌhaɪ pəˈθɜr məl /

adjective

lukewarm; tepid.
characterized by subnormal body temperature.
Geology. (of mineral deposits) formed at great depths and high temperatures.

Origin of hypothermal

First recorded in 1895–1900; hypo- + thermal

British Dictionary definitions for hypothermal

hypothermal
/ (ˌhaɪpəʊˈθɜːməl) /

adjective

Also: hypothermic of, relating to, or characterized by hypothermia
(of rocks and minerals) formed at great depth under conditions of high temperature