As nouns the difference between auricle and macrotia
is that auricle
is (anatomy) the outer ear or pinna while macrotia
is (medicine) abnormal development of the auricle of the ear.
(anatomy) The outer ear or pinna.
(anatomy) An ear-shaped appendage of the left or right atrium of the heart.
(anatomy) An atrium, the smaller of the two types of chamber in the heart.
(botany) Any appendage in the shape of an earlobe.
* (outer ear) pinna, pavilion
(medicine) Abnormal development of the auricle of the ear