semiology (n.)youdaoicibaDictYouDict[semiology 词源字典]
1690s, "sign language," from Greek semeion "a sign, mark, token," from sema (compare semiotic) + -ology. As "branch of medical science concerned with symptoms," 1839; as "logical theory of signs" from 1923. Related: Semiological.[semiology etymology, semiology origin, 英语词源]