Dual

Definitions

1. Of an item that is one of a pair, the other item in the pair.
2. Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
3. The dual number.
4. Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
5. A head-to-head match or meet between two teams, such as two high schools or colleges.

Equivalents

Examples

“The octahedron is the dual of the cube.”

“Wrestling duals and meets take⟳ place⟳ at the Wisconsin Field House. There are no advance single event ticket sales.”

“But Dave agreed to participate⟳ in the Bulgarian dual, and that trapped me into having to wrestle⟳, too.”

“Early in 2021, she became the first female to compete⟳ and win⟳ a match⟳ at the Ter-Hark Cup wrestling dual, helping her squad to victory.”

CEFR level