(n) Canadian dogbane yielding a tough fiber used as cordage by Native Americans; used in folk medicine for pain or inflammation in joints, Syn.rheumatism weed, Apocynum cannabinum
n. (Chem.) A poisonous resin extracted from hemp (Cannabis sativa, variety Indica). The euphoric and narcotic effects of hasheesh are due to this resin; the active ingredient is tetrahydrocannabinol, THC. See Cannabis Indica, below. [ 1913 Webster +PJC ]
n. (Chem. & Med.) A chemical substance (C21H20O2) which is produced by the hemp plant (Cannabis sativa), and is the physiologically active agent of dried preparations of that plant, called variously marijuana, hashish, ganja, hemp, etc.; also called THC. It causes the euphoric effect for which the preparations are smoked or chewed. It is used in medicine in a purified form as an antiemetic (an antinausea agent), especially in conjunction with chemotherapy of cancer. It occurs primarily as the Δ1-3, 4-trans isomer, also called Δ9-THC, with small amounts of the Δ6-3, 4-trans isomer detectable at about 1%. It is a controlled substance, classified as a hallucinogen, and its possession or distribution is illegal in almost all states of the United States. MI11 [ PJC ]
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