dual

Meanings

Plural: duals

Adjective Satellite

consisting of or involving two parts or components usually in pairs
- "dual controls for pilot and copilot"
having more than one decidedly dissimilar aspects or qualities; ; - R.W.Emerson; -Frederick Harrison
- "a double (or dual) role for an actor"
a grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural)
- "ancient Greek had the dual form but it has merged with the plural form in modern Greek"

Adj

Characterized by having two (usually equivalent) components.
Pertaining to two, pertaining to a pair of.
Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes.
Exhibiting duality.
Being the space of all linear functionals of (some other space).
Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms.

Noun

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 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.
A head-to-head match or meet between two teams, such as two high schools or colleges.

Verb

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

Origin / Etymology

PIE word
*dwóh₁
Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis.

Synonyms

binary, double, dual, duple, duplicate, opposite, three-fold, threefold, treble, twin, twissel, two-fold, twofold, twosome

Scrabble Score: 5

dual is a valid Scrabble (US) TWL word
dual is a valid Scrabble Word in Merriam-Webster MW Dictionary
dual is a valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 7

dual is a valid Words With Friends word