| Noropianic | a. [ Etymology uncertain. ] (Chem.) Of, pertaining to, or designating, an acid of the aromatic series obtained from opianic acid. [ 1913 Webster ] |
| Opianic | a. [ From Opium. ] (Chem.) Of, pertaining to, or designating, an organic acid obtained by the oxidation of narcotine. [ 1913 Webster ] |