euthanasia
eu·tha·na·sia
noun \ˌyü-thə-ˈnā-zh(ē-)ə\Definition of EUTHANASIA
: the act or practice of killing hopelessly sick or injured individuals (as persons or domestic animals) in a relatively painless way for reasons of mercy; also : the act or practice of allowing a hopelessly sick or injured patient to die by taking less than complete medical measures to prolong life—called also mercy killing
Learn More About
Seen & Heard 
What made you want to look up euthanasia? Please tell us where you read or heard it (including the quote, if possible).
