Explicator

·noun One who unfolds or explains; an expounder; an Explainer.

explicator
explĭcātor, ōris, m. [explico], an expounder , explainer (Ciceron.): rerum explicator prudens, sev...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
explicator
explicātor ōris, m explico, an expounder, explainer : rerum. ...

An Elementary Latin Dictionary