plebiscitum
/ˌplɛbɪˈsaɪtəm/noun
University
1
A law enacted by the plebs, under the superintendence of a tribune or some subordinate plebeian magistrate, without the senate's intervention.
2
Synonym of plebiscite (“a direct popular vote on an issue of public importance, such as an amendment to the constitution, a change in the sovereignty of the nation, or some government policy; a referendum”).