-olPronunciation: /ɒl/Definition of -ol suffix Chemistry forming names of organic compounds: 1denoting alcohols and phenols:glycerol retinol 2denoting oils and oil-derived compounds:benzolOrigin:-ol (sense 1) from (alcoh)ol; -ol (sense 2) from Latin oleum 'oil'. See also -ole-ol in other Oxford dictionaries Definition of -ol in the US English dictionary