tragus (n.)youdaoicibaDictYouDict[tragus 词源字典]
"eminence at the opening of the ear," 1690s, Modern Latin, from Greek tragos in this sense (Rufus of Ephesus), properly "he-goat;" so called for the tuft of hair which grows there, which resembles a goat's beard.[tragus etymology, tragus origin, 英语词源]