(computing) Either of the characters 0 and 1, used in the binary numeral system.

(computing) A number represented by the binary digits 0 and 1.

(set theory, order theory, "on" a set A) A subset of the Cartesian product A×A (the set of ordered pairs (a, b) of elements of A).

(arithmetic) arithmetic using binary numbers

(mathematics, computer science) A data structure in which each node has at most two children, each node but the root has one parent, and there are no cycles.

(astronomy) A stellar system in which two stars orbit around their center of mass; double star.

(chemistry) A chemical compound composed of only two elements. / (chemistry) A compound composed of an element and a radical (a group of atoms that behave as one piece).

(biology) The process whereby a cell divides asexually to produce two daughter cells.

(astronomy) Two gravitationally connected stars or other celestial objects which orbit around their center of mass.

(genetics) A composite organism created from the combination of DNA from two separate genetic sources, rather than one. Essentially, a binary clone is the naturally produced offspring with germ cells, or else artificially produced offspring of two individuals that has been created without using germ cells.