[te-truh-hahy-druh-kuh-nab-uh-nawl, -nol]
noun Pharmacology.
a compound, C 21 H 30 O 2 , that is the physiologically active component in cannabis preparations (marijuana, hashish, etc.) derived from the Indian hemp plant or produced synthetically. Abbreviation: THC

1965–70; tetra- + hydro-2 + cannabinol

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Medical Dictionary

tetrahydrocannabinol tet·ra·hy·dro·can·nab·i·nol (tět'rə-hī'drə-kə-nāb'ə-nôl', -nōl')

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica


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.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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