cannabinolPronunciation: /ˈkanəbɪˌnɒl, kəˈnab-/Definition of cannabinol noun [mass noun] Chemistry a crystalline compound whose derivatives, especially THC, are the active constituents of cannabis. A polycyclic phenol; chemical formula: C21H26O2 Origin: late 19th century: from cannabis + -olcannabinol in other Oxford dictionaries Definition of cannabinol in the US English dictionary