(trāj'ē-on), A cephalometric point in the notch just above the tragus of the ear; it lies 1-2 mm below the spine of the helix, which can be palpated.
trag·i·on
(Tr) (trāj'ē-on) A cephalometric point in the notch just above the tragus of the ear; it lies 1-2 mm below the spine of the helix, which can be palpated.