DidymusEaston's Dictionary(Gr. twin = Heb. Thomas, q.v.), John 11:16; 20:24; 21:2.Smith's Dictionary(the twin), a surname of the apostle Thomas. (John 11:16; 20:24; 21:2) [Thomas]International Standard Bible Encyclopediadid'-i-mus (Didumos, i.e. "twin"): The surname of THOMAS (which see).