or Cistrum, a kind of ancient musical instrument used by the priests of Isis and Osiris. It is described by Spon as of an oval form, in manner of a racket, with three sticks traversing it breadthwise; which playing freely by the agitation of the whole instrument, yielded a kind of sound which to them seemed melodious. Mr Malcolm takes the fison to be no better than a kind of rattles. Ocelius observes, that the fison is found represented on several medals, and on talismans.