bi ‧ no ‧ mi ‧ al /baɪˈnəʊmiəl $ -ˈnoʊ-/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Modern Latin ; Origin: binomium , from Latin binominis , from bi- ( ⇨ ↑ bi- ) + nomen 'name' ]
technical a mathematical expression that has two parts connected by the sign + or the sign −, for example 3x + 4y or x − 7
—binomial adjective