simbolic
Simbolic is not a standard English term; it is most often encountered as a misspelling or a stylistic variant of symbolic. The conventional English adjective is symbolic, meaning relating to, or using, symbols; it can describe a thing that represents something else, or that has symbolic meaning. In mathematics, logic, computer science, and the arts, symbolic representations and symbolic reasoning are common uses.
Etymology traces symbolic to the Latin symbolum, via Greek symbolon, with the modern English form established
In practical terms, if you mean the concept of symbols or symbol-based representation, you should use symbolic.