consisting of, indicating, or involving two.

Mathematics .

of or pertaining to a system of numerical notation to the base 2, in which each place of a number, expressed as 0 or 1, corresponds to a power of 2. The decimal number 58 appears as 111010 in binary notation, since 58 = 1 × 2 5 + 1 × 2 4 + 1 × 2 3 + 0 × 2 2 + 1 × 2 1 + 0 × 2 0 .

of or pertaining to the digits or numbers used in binary notation.

of or pertaining to a binary system.

(of an operation) assigning a third quantity to two given quantities, as in the addition of two numbers.

Chemistry . noting a compound containing only two elements or groups, as sodium chloride, methyl bromide, or methyl hydroxide.

Metallurgy . (of an alloy) having two principal constituents.

a whole composed of two.

Astronomy . binary star.

Also called binary number. Mathematics . a number expressed in the binary system of notation.

adjective

lone , single , singular

adjective

double , paired , binate , doubled , twice , dual , biform , duple , duplex , duplicate , geminate , twofold , number