Lewis & Short

Parthĕnon, ōnis, m., = Παρθενών,

  1. I. the celebrated temple of Athene on the Acropolis of Athens, the Parthenon, Plin. 34, 8, 19, § 54.
    Hence,
  2. II. Transf., a portico in the villa of Pomponius Atticus, Cic. Att. 13, 40, 1.