sigil

A sigil (pronounced /'sɪdʒ.ɪl/ or /'sɪg.ɪl/; pl. sigilia or sigils) is a symbol created for a specific magical purpose. A sigil is usually made up of a complex combination of several specific symbols or geometric figures each with a specific meaning or intent.

The term sigil derives from the Latin sigilum meaning "seal," though it may also be related to the Hebrew סגולה (segulah meaning "word, action or item of spiritual effect"). The old Norse binding rune is an example of the idea. A sigil may have an abstract, pictorial or semi-abstract form. It may appear in any medium -- physical, virtual, or mental. Visual symbols are the most popular form, but the use of aural and tactile symbols in magic is not unheard of.

_Wikipedia