A trinomial is a polynomial expression consisting of three terms. There are various synonyms for the word trinomial, and some of these include trichotomy, triad, tripartite, tripart, and triptych. These words all have some sort of three-way division or composition, and can be used interchangeably with trinomial in certain contexts. Additionally, the term trinomial can be broken down further based on the degree of the polynomial expression, such as quadratic trinomials or cubic trinomials. Regardless of the specific synonym or designator used, trinomials are an important concept in mathematics that build on the basic principles of algebra.