| heterothermic 
 
 of animals except birds and mammals;
 having body temperature that varies with the environment
 • Syn:
 poikilothermic, poikilothermous, ectothermic
 • Similar to:
 cold-blooded
 • Derivationally related forms:
 poikilotherm (for: poikilothermous), poikilotherm (for: poikilothermic)
 
 
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