Source : Webster's Revised Unabridged Dictionary (1913)

Prothesis \Proth"e*sis\, n. [NL., fr. Gr. ? a placing in public,
   fr. ? to set before; ? before + ? to set, put.]
   1. (Eccl.) A credence table; -- so called by the Eastern or
      Greek Church.

   2. (Med.) See {Prosthesis}. --Dunglison.