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English definition of “cold-blooded”

cold-blooded

adjective     /ˌkəʊldˈblʌd.ɪd/ US  /ˌkoʊld-/
describes animals that can only control their body heat by taking in heat from the outside or by being very active : Snakes and lizards are cold-blooded animals . → Compare warm-bloodedPlants and animals - general words behaving in a very cruel way with no sympathy for other people : a cold-blooded murder Unkind, cruel and unfeelingViolent or aggressiveTreating people or animals badlyInsults and abuse
(Definition of cold-blooded adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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