Dual Definition

do͝oəl, dyo͝o-
duals
adjective
Of two.
Webster's New World
Having or composed of two parts or kinds, like or unlike; double; twofold.
A dual nature.
Webster's New World
Having a double character or purpose.
A belief in the dual nature of reality.
American Heritage
Of, relating to, or being a number category that indicates two persons or things, as in Greek, Sanskrit, and Old English.
American Heritage
Acting as a counterpart.
Wiktionary
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noun
duals
Webster's New World
A word having dual number.
Webster's New World
An inflected form of a noun, adjective, pronoun, or verb used with two items or people.
American Heritage
Of an item that is one of a pair, the other item in the pair.
Wiktionary

(geometry) 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.
Wiktionary
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Other Word Forms of Dual

Noun

Singular:
dual
Plural:
duals

Origin of Dual

  • Latin dualis (“two”), from duo (“two”), + adjective suffix -alis

    From Wiktionary

  • Latin duālis from duo two dwo- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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