<mathematics> An expression consisting of two terms connected by the sign plus (+) or minus; as, a+b, or 7-3.

Origin: L. Bis twice + nomen name: cf. F. Binome, LL. Binomius (or fr. Bi- + Gr. Distribution ?). Cf. Monomial.

1. Consisting of two terms; pertaining to binomials; as, a binomial root.

2. Having two names; used of the system by which every animal and plant receives two names, the one indicating the genus, the other the species, to which it belongs.

<mathematics> Binomial theorem, the theorem which expresses the law of formation of any power of a binomial.

(01 Mar 1998)