Sentence:  Of the two , Porter is justly the better known , for he went far beyond the vital finding of fiction for films to take the first step toward fashioning a language of film , toward making the motion picture the intricate , efficient <WSD>time</WSD> machine that it has remained since , even in the most inept hands . 
Meaning of the word marked with <WSD> tags:  a science fiction machine that is supposed to transport people or objects into the past or the future