An<unk>  is a drug used to lessen pain through reducing the sensitivity of the brain or nervous system. The term was common in medicine before the 20th century, but such drugs are now more often known as analgesics or painkillers. __NOTOC__
Anodyne
Apyrexy
Baffle 
Biorisk
OrthoCor
Aneugen
Protomap 
Horopter