Lunula

[Couch Potatoe]

The light crescent~shaped moon at the base of the fingernails

[Tanya Shivari]

The lunula is a semilunar (half-moon) white region at the base of the nail plate, and is generally found in the thumbnail of most people and in a varying degrees in other fingers.Air mixed in with keratin and cells rich in nuclei gives the lunula its whitish color.