monomial

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Mathematics An algebraic expression consisting of only one term.
• noun Biology A taxonomic name consisting of a single word.

from The Century Dictionary.

• In algebra, consisting of only one term, and not of several added together.
• In zoology and botany, same as mononomial.
• noun In algebra, an expression or quantity consisting of a single term. See binomial. Also monome.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Alg.) A single algebraic expression; that is, an expression unconnected with any other by the sign of addition, substraction, equality, or inequality.
• adjective (Alg.) Consisting of but a single term or expression.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Relative to an algebraic expression consisting of one term.
• noun mathematics A single term consisting of a product of variables with positive integer exponents.
• noun mathematics A single term consisting of a product of numbers and variables with positive integer exponents.