Tetrahydrocannabinol (THC) | Britannica (original) (raw)

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Also known as: THC

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Last Updated: Jan 14, 2025• Article History

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tetrahydrocannabinol (THC), active constituent of marijuana and hashish that was first isolated from the Indian hemp plant (Cannabis sativa) and synthesized in 1965. For the effects of the drug, see marijuana.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Adam Augustyn.