Question

What is the white opaque "moon" often found at the proximal end of a fingernail called?

Answer 1

The white lunar segment is called a "cuticle". It only real function is to help (minutely) with support and covering the nail.

Answer 2

The white crescent at the proximal end is called the lunula.

• It is white because the underlying epithelium is thicker here, and the color of the dermis does not show through from underneath.

What is lunula?

• The lunula is the visible portion of the distal nail matrix that extends beyond the proximal nail fold.
• It is white, half moon shaped, appears by week 14 of gestation.
• The lunula has a primary structural role in defining the free edge of the distal nail.

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