simple past tense and past participle of dual

Alternative form of dualling

Of an item that is one of a pair, the other item in the pair. / (geometry) Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.

(transitive) To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.

Having two parts, uses, or forms.

plural of dual

(category theory) For a given category C, its dual category Cᵒᵖ is obtained by reversing the direction of each one of the arrows of C.

(computing) Having two operating systems available, such that either of them can be selected each time the computer is booted.

Having two purposes; able to be used for two separate things.

plural of dual citizenship