Compounds extracted from cannabis sativa l. And metabolites having the cannabinoid structure. The most active constituents are tetrahydrocannabinol, cannabinol, and cannabidiol. ... (12 Dec 1998) ... 
Type: Term Pronunciation: ka-nab′i-noydz Definitions: 1. Organic substances present in Cannabis sativa, having a variety of pharmacologic properties.
The psychoactive substances found in the common hemp plant, or Cannabis Sativa. Most of the psychological effects are produced by delta-9-tetrahydrocannabinol.