cold-blooded define
Look up cold-blooded or cold blood in Wiktionary, the free dictionary. Cold-blooded is an informal term for one or more of a group of characteristics that determine an animal's thermophysiology. These include: ectothermy, controlling body temperature through external metabolic processes, such as by basking in the sun. poikilothermy, the ability of an organism to function over a wide internal temperature range.