\Lu"ti*dine\, n. [From toluidine, by transposition.]
(Chem.)
Any one of several metameric alkaloids, {C5H3N.(CH3)2}, of
the pyridine series, obtained from bone oil as liquids, and
having peculiar pungent odors. These alkaloids are also
called respectively {dimethyl pyridine}, {ethyl pyridine},
etc.