Adjective

1. Able to be described or limited by a polynomial.
2. of a polynomial name or entity

Noun

1. An expression consisting of a sum of a finite number of terms, each term being the product of a constant coefficient and one or more variables raised to a non-negative integer power, such as $a\_n\; x^n\; +\; a\_\{n-1\}x^\{n-1\}\; +\; ...\; +\; a\_0\; x^0$.
2. A taxonomic designation (such as of a subspecies) consisting of more than two terms.