Mendeleev, Dmitri Syllabification: (Men·de·le·ev, Dmitri)Pronunciation: /ˌmendəˈlāəf, myindiˈleyef/Definition of Mendeleev, Dmitri (1834–1907), Russian chemist; full name Dmitri Ivanovich Mendeleev. He developed the periodic table. Mendeleev, Dmitri in other Oxford dictionaries Definition of Mendeleev, Dmitri in the British & World English dictionary