lunula
The lunula is the small, crescent-shaped area at the base of the nail, typically visible on the thumb and other fingers. It appears lighter in color compared to the surrounding nail and is part of the nail matrix, where new nail cells are produced. The lunula's visibility can vary from person to person and may be more prominent in some individuals.
This structure is important for nail health, as it indicates the growth of the nail. Changes in the lunula's appearance can sometimes signal underlying health issues, making it a point of interest in both dermatology and general health assessments.