- 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; poikilothermic.
- without emotion or feeling; dispassionate; cruel: a cold-blooded murder.
- sensitive to cold.
- having or showing a lack of feeling or pity
- particularly sensitive to cold
- (of all animals except birds and mammals) having a body temperature that varies with that of the surroundings
