binary

bi·na·ry

adj \ˈbī-nə-rē, -ˌner-ē\

Definition of BINARY

1

: compounded or consisting of or marked by two things or parts

2

a : composed of two chemical elements, an element and a radical that acts as an element, or two such radicals b : utilizing two harmless ingredients that upon combining form a lethal substance (as a gas)