monomial noun & adjective. 
[mǝ'nǝʊmɪǝl] E18.[Irreg. from MONO- after binomial.]A. noun.
1.  Math. An expression consisting of one term only. 
E18.2.  = 
MONONYM. 
rare. 
L19.b. adjective.
1.  Math. Consisting of one term only. 
E19.2.  Designating or pertaining to a term, esp. a taxonomic name, consisting of one word only; mononymic. 
L19.  [TahlilGaran] English Dictionary ▲