The etymology of this word is unknown, but a link with Latin nodosus (i.e. ‘knotty’) is not excluded.
s._pl.
1lapid.mythologicalnudiosi, legendary small stones found near a fountain at the foot of Mount Olympus, and said to have the power to cure eyesight:
(
c.1192; MS: c.1275
)
les pieres tant amez Ke nudiosi sunt numez, Que les egles ke mult unt quis, Portent d(r)esk'en nostre pais Dunt il rejovenissent tant Ke la vewe vont recoverant Qu'il aveient devant oscure
127.Y338
nudiosi (c.1192)