In English, "poly-" is a prefix that means "many." Polynomials are groups of monomials that have been added or subtracted. Monomials are things like 3*x*, 4*y*, and the number 5. All of the monomials are called "terms of a polynomial."

Some polynomials have two terms and are called binomials. An example of a binomial is 5*x* - 2.

Some polynomials have three terms and are called trinomials. An example of trinomial is 9*x*^{2} + 6*x* + 1.