Relating to animals that maintain a constant, optimal body temperature; warm-blooded with stable internal heat.
From Greek eu- 'well' plus thermē 'heat,' with -ic. Scientists created this term to describe organisms that regulate their internal temperature precisely, unlike ectothermic (cold-blooded) animals.
Euthermic creatures like you have evolved an amazing superpower—your body fights to keep a constant 98.6°F no matter if it's freezing outside, using up tons of calories to stay warm while cold-blooded animals just shiver or sleep through winter.
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