COLD

blooded adj. 1 Technical poikilothermic or poikilothermal Reptiles are cold-blooded 2 unexcited, unemotional, cool, unimpassioned, unfeeling, callous, thick-skinned, insensitive, heartless, uncaring, stony, steely, stony-hearted, cold-hearted, imperturbable, unmoved, indifferent, unresponsive, unsympathetic, apathetic, dispassionate The murder appeared to be the act of a cold-blooded killer 3 cruel, brutal, savage, inhuman, barbarous, vicious, barbaric, merciless, pitiless, ruthless They were victims of a cold-blooded policy of repatriation