Meaning

noun (mathematics) a quantity expressed as a sum or difference of two terms; a polynomial with two terms

adjective of or relating to or consisting of two terms

adjective having or characterized by two names, especially those of genus and species in taxonomies

originFormed from Late Latin binōmium + -al. The derivation of binōmium is unclear. It was used by Gerard of Cremona in the 12th century. Suggested sources are the Latin nōmen (“name”), the Ancient Greek νομός (nomós, “distribution, pasture”), or the Old French nom (“name”). Gérard de Crémone used the word in his translation of an Arabic commentary on Euclid, corresponding to the Greek "ἐκ δύο…

Etymology from Wiktionary, CC BY-SA 3.0