epistolicyoudaoicibaDictYouDict[epistolic 词源字典]
"Of, relating to, or used in letter-writing; epistolary", Late 17th cent.; earliest use found in Theophilus Gale (1628–1679), ejected minister and theologian. From (i) classical Latin epistolicus in the form or style of letters (2nd cent. a.d. in Aulus Gellius).[epistolic etymology, epistolic origin, 英语词源]