unipotent Syllabification: (u·nip·o·tent)Pronunciation: /yo͞oˈnipətənt/Definition of unipotent adjective 1 Mathematics (of a subgroup) having only one idempotent element. 2 Biology (of an immature or stem cell) capable of giving rise to only one cell type. unipotent in other Oxford dictionaries Definition of unipotent in the British & World English dictionary