The Collaborative International Dictionary of English v.0.48:

Palatine Hill \Palatine Hill\ (p[a^]l"[.a]*t[imac]n), prop. n.
   [L. Mons Palatinus, It. Monte Palatino.]
   One of the "seven hills" of Rome, situated southeast of the
   Capitoline and north-northeast of the Aventine. It borders on
   the Roman Forum; is the traditional seat of the city founded
   by Romulus; was the seat of private and later of imperial
   residences; and contains many antiquities.
   [Century Dict., 1906]

The Collaborative International Dictionary of English v.0.48:

palatine \pal"a*tine\, a. [F. palatin, L. palatinus, fr.
   palatium. See Palace, and cf. Paladin.]
   1. Of or pertaining to a palace, or to a high officer of a
      palace; hence, possessing royal privileges.
      [1913 Webster]

   2. Of or pertaining to the Palatinate.
      [PJC]

   3. Of or pertaining to a Palatine[1].
      [PJC]

   Count palatine, County palatine. See under Count, and
      County.

   Palatine hill, or The palatine, one of the seven hills of
      Rome, once occupied by the palace of the C[ae]sars. See
      also Palatine Hill in the vocabulary, and Palace.
      [1913 Webster]