"eminence at the opening of the ear," 1690s, Modern Latin, from Greek tragos, properly "he-goat;" so called for the tuft of hair which grows there, which resembles a goat's beard.
tragus tra·gus (trā'gəs)
n. pl. tra·gi (-gī, -jī)
The tonguelike projection of skin-covered cartilage in front of the external acoustic meatus. Also called hircus.
Any of the hairs growing at the entrance to the external acoustic meatus. Also called hircus.