the external ear, or that part of the ear which is prominent from the head.-the chamber, or one of the two chambers, of the heart, by which the blood is received and transmitted to the ventricle or ventricles; -- so called from its resemblance to the auricle or external ear of some quadrupeds. see heart.-an angular or ear-shaped lobe.-an instrument applied to the ears to give aid in hearing; a kind of ear trumpet.