Antihelix

Example:The frenal indentation on the ear is a common variation among different ethnicities.

Definition:A fold of skin or other tissue that can form a small flap or pocket, similar to the antihelix in the ear.

Example:The cup-like structure of the antihelix is a significant part of ear morphology.

Definition:A small hollow or fold of skin, often used in a figurative sense to describe a particular feature.