an addictive narcotic extracted from seed capsules of the opium poppy
"The patient was admitted to the hospital after being caught with a large stash of opium hidden in his car."
A yellow-brown, addictive narcotic drug obtained from the dried juice of unripe pods of the opium poppy, Papaver somniferum, and containing alkaloids such as morphine, codeine, and papaverine.
"The historical account describes how travelers in the region would harvest the yellow-brown paste known as opium from the unripe pods of the opium poppy to create a potent narcotic."