WordNet
lip reader
n. someone who can understand spoken words by watching the movements of a speaker's lips
Usage examples of "lip reader".
However, I am an excellent lip reader in French, English, Arabic, Swahili, and a number of Bantu languages and dialects (if the latter are not tone languages).
But he had been able to follow the complementing hand gestures of his fellow thranx, while Briann was an accomplished lip reader.