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.

Characterized by having two (usually equivalent) components. / Pertaining to two, pertaining to a pair of.

Alternative form of dualling

simple past tense and past participle of dual

plural of dual

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

Alternative spelling of dual-boot

plural of dual polyhedron

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