Dictionary

THC

noun \ˌtē-(ˌ)āch-ˈsē\

Definition of THC

:  either of two physiologically active isomers C21H30O2 from hemp plant resin; especially :  one that is the chief intoxicant in marijuana

Origin of THC

tetrahydrocannabinol
First Known Use: 1967

THC

noun \ˌtē-ˌāch-ˈsē\   (Medical Dictionary)

Medical Definition of THC

:  either of two physiologically active isomers C21H30O2 that occur naturally in hemp plant resin or are synthetically prepared: a :  one that is the chief intoxicant in marijuana and is used medicinally—called also delta-9-tetrahydrocannabinol, delta-9-THC; see dronabinol b :  one that is present in marijuana only in minute quantities

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