characterized by subnormal body temperature.
Geology. (of mineral deposits) formed at great depths and high temperatures.
Origin of hypothermal
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Also: hypothermic of, relating to, or characterized by hypothermia
(of rocks and minerals) formed at great depth under conditions of high temperature
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012