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From New Latin, from Ancient Greek ὑπο- (hupo-, “under”) + θέρμη (thérmē, “heat”) + -ία (-ía, “feminine suffix”) . By surface analysis, hypo- + therm- + -ia.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Abnormally low body temperature; specifically, below 35 degrees Celsius for humans. Full definition →