• (n.) A polymeric form of pyridine, C10H10N2, obtained as a colorless oil by the action of sodium on pyridine.
Di·pyr'i·dine noun [ Prefix di- + pyridine .] (Geom.) A polymeric form of pyridine, C 10 H 10 N 2 , obtained as a colorless oil by the action of sodium on pyridine.