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Webster 1913 Edition

Noun.

(Chem.)

A liquid base,

C9H13N

, of the pyridine group, found in coal tar; also, any one of the series of isomeric substances of which it is the type.

parvoline ‎(countable and uncountable, plural parvolines)

(organic chemistry) A base of the pyridine group, found in coal tar.
(organic chemistry) Any of the series of isometric substances of which parvoline is the type.