# Binary operation

a mathematical operation in which two elements are combined to yield a single result:

Addition and multiplication are binary operations on the set of real numbers.

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- Binary opposition
a relation between the members of a pair of linguistic items, as a pair of distinctive features, such that one is the absence of the other, as voicelessness and voice, or that one is at the opposite pole from the other, as stridency and mellowness.

- Binary pulsar
a pulsar in a binary system.

- Binary star
a system of two stars that revolve about their common center of mass. Historical Examples Astronomical Curiosities J. Ellard Gore The Astronomy of Milton’s ‘Paradise Lost’ Thomas Orchard noun a double star system comprising two stars orbiting around their common centre of mass. A visual binary can be seen through a telescope. A spectroscopic binary […]

- Binary system
a system involving only two elements, as 0 and 1 or yes and no. Mathematics. a system of counting or measurement whose units are powers of two. Compare binary (def 2a). Astronomy, binary star. Historical Examples The Astronomy of Milton’s ‘Paradise Lost’ Thomas Orchard The Phase Rule and Its Applications Alexander Findlay The Phase Rule […]