Lewis & Short

suggestum, i, n. [suggero],

  1. I. a raised place, height, mound: ex suggesto faleris prodeunt anates in stagnum, Varr. R. R. 3, 5, 16.
  2. II. Esp., a platform, stage, tribune for a speaker: cum in communibus suggestis consistere non auderet, Cic. Tusc. 5, 20, 59: illud suggestum, in quo causam dixerat, ascendens, id. Div. 1, 54, 124.