dual
Characterized by having two (usually equivalent) components.
Adjective 4 meanings
Characterized by having two (usually equivalent) components.
“a dual-motor vehicle”
Pertaining to two, pertaining to a pair of.
“dual engine failure”
Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes.
“Modern Arabic displays a dual number, as did Homeric Greek.”
Exhibiting duality.
Noun 4 meanings
Of an item that is one of a pair, the other item in the pair.
Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
“The octahedron is the dual of the cube. The icosahedron is the dual of the dodecahedron.”
The dual number.
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.
Verb 1 meaning
To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.
Etymology
PIE word *dwóh₁ Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis.
Similar and opposite words
DUAL at a glance
DUAL has 4 letters and scores 5 points in Scrabble (D 2 + U 1 + A 1 + L 1) and 7 in Words With Friends, before board bonuses. It ranks #4,361 by how often it appears in everyday English. It is valid in ENABLE, NWL2023, Collins/SOWPODS.
Rhymes with dual
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