| 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. |

| cold-blood·ed (kōld'blŭd'ĭd) adj.
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cold-blooded adj.
Ectothermic.