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heterotherm
het·er·o·therm [ héttərə thùrm ] (plural het·er·o·therms)


noun 
Definition:
 
animal that partially regulates body temperature: an animal that sometimes maintains its body temperature at a certain level, e.g. when active, but at other times allows it to fluctuate with the environment

het·er·other·mic [ hèttərə thúrmik ] adjective
het·er·o·ther·my [ héttərə thùrmee ] noun
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