Not everyone has visible lunula's The lunula is normally more prominent on the thumbs

The Lunula is often referred to as "moons". The lunula is in fact the front end of the matrix. The whitish half moons are keratin cells that have not yet been completely flattened and still have some of their content. Not everyone has visible lunula's The lunula is normally more prominent on the thumbs. The shape of the lunula determines the shape of the free edge/distal edge.

This is called the lunula.

The lunula, or lunulae (pl.) (little moon in Latin), is the crescent-shaped whitish area of the bed of a fingernail or toenail. The lunula is the visible part of the root of the nail.

The lunula is located on the fingernail. It is the white crescent shaped area on the fingernail.