\-ine\ (?; 104).
1. (Chem.) A suffix, indicating that those substances of
   whose names it is a part are basic, and alkaloidal in
   their nature.
Note: All organic bases, and basic substances (especially
      nitrogenous substances), are systematically written
      with the termination -ine; as, quinine, morphine,
      guanidine, etc. All indifferent and neutral substances,
      as proteids, glycerides, glucosides, etc., should
      commonly be spelled with -in; as, gelatin, amygdalin,
      etc. This rue has no application to those numerous
      commercial or popular names with the termination -ine;
      as, gasoline, vaseline, etc.
2. (Organ. Chem.) A suffix, used to indicate hydrocarbons of
   the second degree of unsaturation; i. e., members of the
   acetyline series; as, hexine, heptine, etc.