phorbolPronunciation: /ˈfɔːbɒl/Definition of phorbol noun [mass noun] Chemistry a compound present (in the form of highly carcinogenic esters) in croton oil. A tetracyclic alcohol; chemical formula: C20H28O6 Origin: 1930s: from Greek phorbē 'fodder' (from pherbein 'to feed') + -ol
