(a.) Having a varying body temperature. See Homoiothermal.

affectless anesthetized arctic autistic blunt callous calloused catatonic chill chilly cold cold as charity cold of heart coldblooded coldhearted cool cryogenic cryological dispassionate drugged dull emotionally dead emotionless flinthearted frigid frosted frosty frozen hard hard of heart hardened hardhearted heartless heterothermic icy immovable impassible impassive inexcitable insensitive insusceptible nonemotional obdurate objective obtuse out of touch passionless poikilothermic self-absorbed soulless spiritless stonyhearted unaffectionate unemotional unfeeling unimpassioned unimpressionable unloving unmerciful unnatural unpassionate unresponding unresponsive unsusceptible unsympathetic untouchable