eolithic (adj.)youdaoicibaDictYouDict[eolithic 词源字典]
"pertaining to the early Stone Age," 1890, from French éolithique (1883), from eo- "earliest" (see eo-) + French lithique, as in néolithique (see neolithic). Related: eolith (1890).[eolithic etymology, eolithic origin, 英语词源]