A Monomial is an expression that contains only one term.

Examples of Monomial are 2x², 5z³x, 8t, 6, etc.

A Binomial is an expression that contains two terms.

Examples of Binomial are 2x³+1, 5z²x-3x, 4z+8t², 9-4y³, etc.

The expression that contains three terms is known as a Trinomial.

Examples of Trinomial are 5x+7y²+z, 8t³-6u+1, 4+7n+3z³, a²+b-c³, etc.