#auricle

• Antitragus — A small, cartilaginous prominence located on the pinna of the external ear (auricle), situated symmetrically at the lower part of the antihelix and placed directly opposite the tragus, from which it is separated by the intertragic notch. This fine anatomical structure plays a decorative and functional role in helping direct sound waves into the external auditory canal and also represents a common landmark in modern piercing procedures.
• Auricle — An anatomical pouch-like or small sac structure located on the upper part of each of the two cardiac atria (left and right auricles), serving to increase blood storage capacity. In zoology and comparative anatomy, the term also denotes the pinna of the external ear in mammals or a lateral prolongation in certain invertebrates.
• Auricle — A prominent anatomical pouch-like or ear-shaped structure attached to the cardiac atria, serving to increase their volumetric capacity; a feminine variant commonly found in older treatises for 'auricul'. In botany, it denotes a small rounded lobe located at the base of certain leaves or petals, partially clasping the stem.