The Collaborative International Dictionary of English v.0.48:
Pantomimist \Pan"to*mi`mist\, n. An actor in pantomime; also, a composer of pantomimes. [1913 Webster]WordNet (r) 3.0 (2006):
pantomimist n 1: an actor who communicates entirely by gesture and facial expression [syn: mime, mimer, mummer, pantomimer, pantomimist]