adjective
Definition: Relating to or consisting of three distinct parts or terms, often used in mathematics or biology.
Example: In mathematics, a trinomial can be expressed as the sum of three terms.
noun
Definition: A mathematical expression that has three separate parts, usually connected by plus or minus signs, or a name in biology that includes three parts to classify an organism.
Example: In algebra, a trinomial can be expressed as x^2 + 5x + 6.