(chiefly historical)the surgical removal of some of a patient's blood for therapeutic purposes (主 史)放血(术) ■the violent killing and wounding of people during a war or conflict 杀戮,血洗 gang members have halted their internecine bloodletting. 匪帮内部已经停止了两败俱伤的流血冲突。 ■bitter division and quarrelling within an organization 内讧