onychia
/əʊˈnɪkɪə/Medicine. Now rare
noun
Originally: †a whitlow affecting a fingernail or toenail; = paronychia ( obsolete ). Later: disease, especially inflammation or infection, of the nail matrix, resulting in deformity or loss of the nail plate.
Origin
Early 19th century. From scientific Latin onychia from ancient Greek ὄνυχ-, ὄνυξ nail + classical Latin -ia, after post-classical Latin paronychia.