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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
  • bradymetabolism, the ability to greatly alter metabolic rate in response to need; for example, animals that hibernate

"Cold blooded" and "Coldblooded" may also refer to:




  • A person or act said to be lacking in conscience
  • A horse bred for strength and calmness, such as a draft horse

See also[edit]