In this section, we'll start with the etymology and definition of polynomial. Then you'll apply the definition to determine whether some expressions are polynomials. You'll also learn how to determine whether a polynomial is a monomial, binomial, trinomial, etc. Then you'll learn how to identify coefficients, terms, leading terms, leading coefficients, and constant terms. Further, you'll learn how to identify the degree of terms and polynomials. The terminology introduced here is important, as we'll be using it extensively in the future.