an algebraic expression of the sum or the difference of two terms

we have combined the two terms into a single binomial

a two-part name, especially the Latin name of a species of living organism (consisting of the genus followed by the specific epithet)

there are lots of animals with ‘lituratus’ as the second part of their scientific binomial

a noun phrase with two heads joined by a conjunction, in which the order is relatively fixed (as in knife and fork)