Lewis & Short

Londīnĭum (Lund-), ĭi, n.,

  1. I. a city in Britain, the modern London, Tac. A. 14, 33; Amm. 27, 8, 7; 28, 3, 1.
    Hence,
  2. II. Lon-dīnĭensis, e, adj., of London: oppidum Londiniense, Eum. Paneg. ad Const. 17.