prolocutor
/ˈprəʊləˌkjuːtə
/ /ˈprɒləˌkjuːtə/ /prə(ʊ)ˈlɒkjʊtə /noun
1A chairperson of the lower house of convocation in a province of the Church of England.The archbishop presided over the whole convocation; the lower house, when sitting separately, was chaired by its elected prolocutor, its channel of communication to the bishops.
2 archaic or formal A spokesman.
Origin
Late Middle English (in sense 2): from Latin, from prolocut- 'spoken out', from the verb proloqui, from pro- 'before' + loqui 'speak'.