anadromous (adj.)youdaoicibaDictYouDict[anadromous 词源字典]
of fish, "ascending a river to spawn" (as salmon do), 1753, from Latinized form of Greek anadromos "running upward," from ana "up, back" (see ana-) + dramein "to run" (see dromedary).[anadromous etymology, anadromous origin, 英语词源]