Entry 1 sense Webster, 1913 Cumidine /(k?"m?-d?n [or] -d?n)/ · Cu·mi·dine · IPA 01 n. A strong, liquid, organic base, C3H7.C6H4.NH2, homologous with aniline. 1. A strong, liquid, organic base, C3H7.C6H4.NH2, homologous with aniline.(Chem.)