warm-blooded vs. cold-blooded

Also designating or pertaining to animals, as mammals and birds, whose blood ranges in temperatures from about 98° to 112°F (37° to 44°C) and remains relatively constant, irrespective of the temperature of the surrounding medium; homoiothermal.

ardent, impetuous, or passionate.

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.

sensitive to cold.