The Collaborative International Dictionary
Dipyridine
Dipyridine \Di*pyr"i*dine\ (?; 104), n. [Pref. di- + pyridine.] (Geom.) A polymeric form of pyridine, C10H10N2, obtained as a colorless oil by the action of sodium on pyridine.
Wiktionary
dipyridine
n. (context organic compound English) A bicyclic heterocycle consisting of two fused pyridine rings