plural of dual school

(dated) A mixed-sex school.

(economics) person of a couple with two jobs and thus two incomes; they may or may not have children.

plural of dual earner

(graph theory) A graph derived from some plane graph in such a way that the derived graph has a vertex corresponding to each face of the given graph, an edge corresponding to each edge of the given graph that is shared by a pair of distinct faces, and a self-loop for each edge of the given graph that is a border of the same face on both of its sides.

plural of dual-band

(rail transport, of an electric train) Able to run using two different voltages, depending on the voltage supplied to the particular railway line, whether by third rail direct current or overhead wires.

Alternative form of dualtropic.

(law, taxation) A person who is a resident for tax purposes in two or more countries.

plural of dual resident