external ear 
noun
The parts of the ear outside the eardrum, especially the pinna.Under direct vision the excessive hair follicles of the external ear canal and pinna were targeted by the laser beam....
- The ear canal terminates at the eardrum (tympanic membrane), which forms the boundary between the external ear and the middle ear.
- Otitis externa, the clinical term for swimmer's ear, is an inflammation of the canal joining the eardrum to the external ear.