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The lunula (pl.: lunulae; from Latin 'little moon') is the crescent-shaped whitish area of the bed of a fingernail or toenail. In humans, it appears by week 14 [ 1 ] of gestation , and has a primary structural role in defining the free edge of the distal nail plate (the part of the nail that grows outward).
The lunula ("small moon") is the visible part of the matrix, the whitish crescent-shaped base of the visible nail. The lunula can best be seen in the thumb and may not be visible in the little finger. The lunula appears white due to a reflection of light at the point where the nail matrix and nail bed meet.
The lunula is made of decorated gold and dated to 2200-2000 BC and is one of the earliest gold ornaments from Wales. [1] Other estimates suggest 2400-2000 BC of the Late Neolithic/Early Bronze Age. [2] The lunula is the heaviest lunula from the islands of Britain and Ireland, weighing 185g. [3] Llanllyfni lunula.
In the key of C, white keys represent leap years if every half-step between white key indicating 1 whole year between leap years and a whole-step between white keys indicates two complete years between leap years. For a total of 7 leap years for every 19 years beginning with C as year 0/year 19 in the cycle.
Lunula (Latin for "little moon") may refer to: Lunula (amulet) , a Roman amulet worn by girls, the equivalent of the bulla worn by boys Gold lunula , a specific kind of archaeological solid collar or necklace from the Bronze Age or later
A gold lunula (pl. gold lunulae) was a distinctive type of late Neolithic, Chalcolithic, and—most often—early Bronze Age necklace, collar, or pectoral shaped like a crescent moon. Most are from Prehistoric Ireland . [ 1 ]
Blue nails, or more formally azure lunula, are characterized by a blue discoloration of the lunulae, seen in argyria and cases of hepatolenticular degeneration (Wilson's disease), also having been reported in hemoglobin M disease and hereditary acrolabial telangiectases.
In human anatomy, the eponychium is the thickened layer of skin at the base of the fingernails and toenails. [1] It can also be called the medial or proximal nail fold. The eponychium differs from the cuticle; the eponychium comprises live skin cells whilst the cuticle is dead skin cells.