magic square

noun2

1. •
   An n-by-n arrangement of n² numbers such that the numbers in each row, in each column and along both diagonals all have the same sum.
2. •
   A palindromic square word arrangement, usually in the form of a magic amulet.

   • Probably the best-known magic square is the 5×5 square consisting of the words ROTAS OPERA TENET AREPO SATOR.