Middle Ages (n.)youdaoicibaDictYouDict[Middle Ages 词源字典]
"period between ancient and modern times" (formerly roughly 500-1500 C.E., now more usually 1000-1500), attested from 1610s, translating Latin medium aevum (compare German mittelalter, French moyen âge).[Middle Ages etymology, Middle Ages origin, 英语词源]