pentobarbital

noun

1. (countable, uncountable)A narcotic and sedative barbiturate drug (trademark Nembutal) formerly used to relieve insomnia.

   “And lest anyone think traipsing through the gray and bleach-smelly execution chamber where triple homicide offenders are injected with pentobarbital isn't depressing enough, later they will stage a press conference in front of the gates of Captain Joe Byrd Cemetery, the parched plot of land where executed prisoners whose bodies family members prefer not to claim are buried.”