Final answer:
The expression 11x + 13y - 33z + 2 is a polynomial.
Step-by-step explanation:
The given expression is 11x + 13y - 33z + 2.
To identify the correct word to describe this expression, we need to analyze its structure. The expression consists of terms with variables x, y, and z, multiplied by their respective coefficients. Each term is combined using the addition operation. Therefore, the correct word to describe this expression is a polynomial.