Source : Webster's Revised Unabridged Dictionary (1913)

Tragus \Tra"gus\, n. [NL., fr. Gr. ? a part of the inner ear.]
   (Anat.)
   The prominence in front of the external opening of the ear.
   See Illust. under {Ear}.

Source : WordNet®

tragus
     n : a small cartilaginous flap in front of the external opening
         of the ear
     [also: {tragi} (pl)]