Koilonychia (Spoon Nails)
Why koilonychia is referred to as spoon nail?
Spoon nails are thin and soft and shaped like a little spoon that is often capable of holding a drop of water. There are many causes, but the most frequent one is iron deficiency anemia. The medical name for spoon nails is koilonychia, from the Greek words for hollow (koilos) and nail (onikh).