Magic squares are squares which are divided into parts with each part becoming a square within the larger square.
Magic squares have been found in ancient writings from many parts of the world, and in some cultures they were thought to possess magical or supernatural powers. Medieval and classical numerologists and magicians used magic squares in the making of talismans.
Cliff Pickover: beyond simple magic squares (Yantras)
Sri Yantra: Sacred Art and Geometry of Tantra
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Perhaps the most noticeable feature of Liber Lunae is its set of magic squares. In MS. Sloane 3826, four of these squares contain errors; corrections appear at the end of the transcription.
This is a word that will have the same spelling when read forwards or backwards. Sometimes these words may be found in magic squares. Many of these words are used in spells. The Tamar are known to use such words in their language.
See also: What is the meaning of Magic, Square, Symbol, Spell, World?