from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A deformity of the nails characterized by concavity of the outer surface
from The Century Dictionary and Cyclopedia
- n. A spoon-shaped finger-nail with surface concave instead of convex.
Sorry, no etymologies found.
Also known as koilonychia, spoon nails can be a sign of iron-deficiency anemia.
I knew because she had koilonychia, concave, spoon-shaped nails.
It had some beneficial effect on my nails, but, unfortunately, I stopped taking the supplements shortly after that and saw the resumption of nail problems including the koilonychia.
I doubt there is any kind of a familial tendency (not that there are any recognized genetic causes of iron-deficiency anemia) - my great aunt and my sister both suffer (ed) from pernicious anemia but I don't know of anyone in my family who had iron-deficiency anemia except for me, but then again I am usually the odd one out in my family. anemia and koilonychia a year and a half ago, I'd half-heartedly experimented with taking my multi-vitamin supplements.