#### Answer

monomial

#### Work Step by Step

RECALL:
(1) The terms of a polynomial are seprated by either an addition or a subtraction operation.
(2) A monomial is a polynomial with one term.
(3) A binomial is a polynomial with two terms.
(4) A trinomial is a polynomial with three terms.
(5) A polynomial with 4 or more terms has no special name.
The given polynomial has only one term, so it is a monomial.