wú dào dōng
1.谓己之学术向东流播。《后汉书．郑玄传》:"﹝玄﹞乃西入关，因涿郡卢植，事扶风马融……因从质诸疑义，问毕辞归。融喟然谓门人曰:‘郑生今去，吾道东矣。‘"后因用为感叹己之学术东流或同道东去的语典。汉语辞海