deuteric Syllabification: (deu·ter·ic)Pronunciation: /d(y)o͞oˈterik/Definition of deuteric noun Geology relating to or denoting alteration of the minerals of an igneous rock during the later stages of consolidation. Origin: early 20th century: from deutero- 'secondary' + -icdeuteric in other Oxford dictionaries Definition of deuteric in the British & World English dictionary