Arenation is an uncommon kind of therapeutic dry bath, using hot sand. At various times it has been described as `applied`, sprinkled upon a patient, or putting the feet in the hot sand. The term is from the Latin arenatio, from arena, `sand`. ...
• (n.) A sand bath; application of hot sand to the body.
Ar`e·na'tion (ăr`e*nā'shŭn) noun [ Latin arenatio , from arena sand.] (Medicine) A sand bath; application of hot sand to the body. Dunglison.