Joke on me. I thought it was synonym for sauna.
sudarium
n.,
pl. 3i[a 73!8 5L < sudor, SWEAT6 in ancient Rome, a cloth for wiping sweat from the face Also su[da[ry 7s14d! rc8, pl. 3ries

synonym for sauna

That'd be sudatorius, Dr. Bill.

Dear Faldage: that reminded me of site about Stone Age Skara Brae, which said they had
sauna heated by hot rock tossed into pit containing water. I wonder how they handled the
hot rocks without burning their hands. What's your theory?

Such a big word for wiping off sweat? Really?