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Meaning of cold-blooded

cold-blood•ed

Pronunciation: (kōld'blud'id), [key]
— adj.
  1. designating or pertaining to animals, as fishes and reptiles, whose blood temperature ranges from the freezing point upward, in accordance with the temperature of the surrounding medium; poikilothermal.
  2. without emotion or feeling; dispassionate; cruel: a cold-blooded murder.
  3. sensitive to cold.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.