idiographyoudaoicibaDictYouDict[idiograph 词源字典]
"A piece or sample of a person's own handwriting; an autograph", Early 17th century; earliest use found in Henry Cockeram (fl. 1623–1658), lexicographer. From idio- + -graph; compare Byzantine Greek ἰδιόγραϕον autograph.[idiograph etymology, idiograph origin, 英语词源]