cold-blooded

Adjective
  1. Without compunction or human feeling (synset 301267081)
    "in cold blood"; "cold-blooded killing"; "insensate destruction"
    similar to: inhumane - lacking and reflecting lack of pity or compassion
    same as: cold, inhuman, insensate
  2. Having cold blood (in animals whose body temperature is not internally regulated) (synset 302543370)
    referred to in: zoological science, zoology - the branch of biology that studies animals
    similar to: ectothermic, heterothermic, poikilothermic, poikilothermous - of animals except birds and mammals; having body temperature that varies with the environment

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