eponychia ep·o·nych·i·a (ěp'ə-nĭk'ē-ə)
n.
An infection affecting the proximal nail fold.
eponychium ep·o·nych·i·um (ěp'ə-nĭk'ē-əm)
n.
The condensed eleidin-rich areas of the epidermis preceding the formation of nails in the embryo.
The thin skin adhering to the nail at its base.