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dual
Longman Dictionary of Contemporary English
dual
adjective
COLLOCATIONS FROM OTHER ENTRIES
a dual purpose (=two purposes)
▪ A dog can fulfil a dual purpose by providing both company and security.
a dual role (=when someone or something does two things)
▪ People have dual roles in society as producers and consumers.
dual carriageway
dual citizenship (=the legal right of being a citizen in two countries)
▪ McGuirk holds dual citizenship in Ireland and the US.
dual nationality (=the state of being a citizen of two countries)
COLLOCATIONS FROM CORPUS
■ NOUN
carriageway
▪ This prime site is adjacent to the dual carriageway at the main entrance to the port.
▪ The accident happened on a busy dual carriageway when the transporter hit a grass verge and landed on top of one of the cars.
▪ Every major road out of the centre had its tramway running up the centre of a dual carriageway.
▪ From the Bypass east to the city limits, the A71 has been built as a dual carriageway, 7.3 metres wide.
▪ Then he drove off, the wrong way down the dual carriageway, said Jane Cockburn, prosecuting.
▪ He drove a wide circle out of the car park towards the slip-road that would take him back to the dual carriageway.
▪ Chased by the youths, he ran across a dual carriageway and flagged down a driver who rushed him to hospital.
▪ The motorway petered out into dual carriageway.
citizenship
▪ Mr Kohl himself has floated the idea of offering dual citizenship on a trial basis.
▪ Some of the athletes in this international potpourri, like Kaila, McGuirk and Thomson, hold dual citizenship.
▪ However, dual citizenship would not be allowed.
▪ Why, Fox is so diverse that he even has dual citizenship -- neither of them in the United States.
control
▪ The two pilots sat side-by-side in an enclosed cockpit, with a gangway between the seats and full dual control provided.
▪ It must also be reinforced by matrix systems such as dual control and evaluation systems...
▪ The dual control antics of the two drunks was spotted on police video, a court heard yesterday.
▪ Specification T11/49 had been issued for a dual control trainer but this was not due to enter service until mid-1953.
▪ Trislanders have no autopilot, and in most cases no dual control.
function
▪ In similar vein, dare it be said that the charitable function of Age Concern serves this dual function?
▪ For women preachers in particular, these testimony stories fulfill a dual function.
▪ It will have a dual function.
▪ Of the fifteen rotary controls that adorn the S120's front panel, all except one is dual function.
▪ This method serves a dual function - it will absorb irregularities in the existing floorboards, and also muffle sound.
▪ It was seen to derive directly from the dual functions of the state, the securing of accumulation and legitimation.
▪ As a New Town, Cramlington has always had a dual function.
▪ Hence medicine under capitalism has a dual function, both liberating and controlling.
nationality
▪ There could not even be a question of dual nationality.
nature
▪ This is the dual nature of woman epitomized in nineteenth-century medical beliefs and which continues today.
▪ They issued a report in July 1992 which acknowledged the dual nature of the experiment.
problem
▪ Alternatively, we could have used the fact that LPI* and LPII* are dual problems.
▪ The defence establishment is faced with a dual problem.
purpose
▪ This was a Baptist church in an inner city area with a modern dual purpose building surrounded by high-rise local authority dwellings.
▪ This is a dual purpose crop.
▪ We ask both groups to be aware that the paths have a dual purpose and to show consideration for each other.
▪ This visit made apparent the dual purpose of the scheme - of accountability and professional development.
▪ The dual purposes of this chapter are to describe and explain this major division in the distribution of resources in old age.
▪ This is a difficult question to deal with partly because of the dual purpose of the entire exercise.
▪ This is a dual purpose exercise which develops the strength in your legs and the flexibility in your shoulders.
role
▪ Councillor Tait has now been handed a letter which expresses concern over Mr Gilbert's dual role.
▪ His decision was made in 1992, when he gave up his brief dual role as publisher.
▪ In addition to this worry about the dual role, some teachers, and headteachers in particular, doubt the skills and experience of advisers.
▪ Balancing the dual roles of minister to the world and shepherd to his own flock has taken its toll.
▪ His Role: Melville has cast Pip in a dual role.
▪ Investment has a dual role to play within any economy.
▪ Coach Mike Sherman will take over in a dual role after Wolf's last day on June 1.
strategy
▪ Hopkins was clear about the dual strategy of the new purity movement.
▪ Their success was founded on a dual strategy.
▪ It has employed a dual strategy to achieve these two objectives.
▪ To counteract this, clownfish have adopted a dual strategy to deceive the anemone.
system
▪ The Board schools were set up, governed by local worthies, creating a dual system.
▪ But Dewey adamantly opposed a dual system of education, with one curriculum for the college-bound and another for everyone else.
▪ Many pupils are bemused by the dual system of measures.
▪ The contrast between these two is a further reason for the popularity of dual systems.
EXAMPLES FROM OTHER ENTRIES
▪ Don Jose continued in his dual role of father and teacher to his son.
▪ He found it difficult to cope with the dual pressures of work and home life.
▪ He has dual nationality because his father was born in Pakistan and his mother is British.
▪ It's much safer if you learn to drive in a car which has dual controls.
▪ The magistrate's court has a dual function: to try minor cases and consider whether in more serious cases there is enough evidence for a trial to take place.
EXAMPLES FROM CORPUS
▪ I can summarize the preceding by pointing to the fact that there is actually a dual metaphor being employed.
▪ It must also be reinforced by matrix systems such as dual control and evaluation systems...
▪ The dual character of therapy, then, is actually two sections of the same thing: relieving engrams.
▪ This is not the place to explore the subtleties of dual or segmented labour market theories.
The Collaborative International Dictionary
Dual

Dual \Du"al\, a. [L. dualis, fr. duo two. See Two.] Expressing, or consisting of, the number two; belonging to two; as, the dual number of nouns, etc., in Greek.

Here you have one half of our dual truth.
--Tyndall.

Douglas Harper's Etymology Dictionary
dual

c.1600, from Latin dualis, from duo "two" (see two). Related: Dually.

Wiktionary
dual

a. 1 Exhibiting duality; characterized by having two (usually equivalent) components. 2 Acting as a counterpart. 3 Double. 4 (context grammar English) Pertaining to grammatical number (as in singular and plural), referring to two of something, such as a pair of shoes, in the context of the '''singular''', '''plural''' and in some languages, '''trial''' grammatical number. Modern Arabic displays a dual number, as did Homeric Greek. 5 (context linear algebra English) (rfdef topic=mathematics English) 6 (context category theory English) (rfdef topic=mathematics English) n. 1 Of an item that is one of a pair, the other item in the pair. 2 (context geometry English) Of a regular polyhedron with ''V'' vertices and ''F'' faces, the regular polyhedron having ''F'' vertices and ''V'' faces. 3 (context grammar English) dual number The grammatical number of a noun marking two of something (as in singular, dual, plural), sometimes referring to two of anything ('''a couple of''', '''exactly two of'''), or a chirality-marked pair (as in left and right, as with gloves or shoes) or in some languages as a discourse marker, "between you and me". A few languages display trial number. 4 (context mathematics English) 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.

WordNet
dual
  1. adj. consisting of or involving two parts or components usually in pairs; "an egg with a double yolk"; "a double (binary) star"; "double doors"; "dual controls for pilot and copilot"; "duple (or double) time consists of two (or a multiple of two) beats to a measure" [syn: double, duple]

  2. having more than one decidedly dissimilar aspects or qualities; "a double (or dual) role for an actor"; "the office of a clergyman is twofold; public preaching and private influence"- R.W.Emerson; "every episode has its double and treble meaning"-Frederick Harrison [syn: double, twofold, treble, threefold]

  3. 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"

Wikipedia
Dual

Dual may refer to:

  • Dual (mathematics), a notion of paired concepts that mirror one another
    • Dual (category theory), a formalization of mathematical duality
    • . . . see more cases in :Category:Duality theories
  • Dual (grammatical number), a grammatical category used in some languages
  • Dual impedance, electrical circuits that are the dual of each other
  • Dual diagnosis, a psychiatric diagnosis of co-occurrence of substance abuse and a mental problem
  • Dual fertilization, simultaneous application of a P-type and N-type fertilizer
  • DUAL (cognitive architecture), an artificial intelligence design model
  • DUAL algorithm, or Diffusing update algorithm, used to update Internet protocol routing tables
  • DUAL table, a special one-row and one-column database table
  • Dual SIM cellphone
  • Dual (brand), a manufacturer of Hifi equipment
  • Dual county, referring to a Gaelic Athletic Association county which traditionally competes at a similar level in both Gaelic football and hurling
  • Aerochute International Dual a two-seat Australian powered parachute design
Dual (grammatical number)

Dual ( abbreviated ) is a grammatical number that some languages use in addition to singular and plural. When a noun or pronoun appears in dual form, it is interpreted as referring to precisely two of the entities (objects or persons) identified by the noun or pronoun. Verbs can also have dual agreement forms in these languages.

The dual number existed in Proto-Indo-European. It persisted in many of the ancient Indo-European languages that descended from it such as Ancient Greek, and Sanskrit, which still uses dual forms across nouns, verbs, and adjectives, and Gothic, which used dual forms in pronouns and verbs. It can still be found in a few modern Indo-European languages such as Scottish Gaelic, Slovenian, and Sorbian. Many more modern Indo-European languages show residual traces of the dual, as in the English distinctions both vs. all, either vs. any, neither vs. none, and so on.

Many Semitic languages also have dual number. For instance, in Arabic, , is added to the end of any noun to indicate that it is dual (regardless of how the plural is being formed).

It is also present in those Khoisan languages that have a rich inflectional morphology, particularly Khoe languages.

Dual (brand)

Dual (pronounced or ) is a brand name of audio and video electronics.

Dual (film)

Dual is a 2008 independent Western drama film. It was directed by Steven R. Monroe and written by and starring Michael Worth.

Dual (mathematics)
Dual (Heroes)

"Dual" is the thirteenth episode of the third season of the NBC science fiction drama series Heroes and forty-seventh episode overall. The episode aired on December 15, 2008, as the conclusion to the "Volume 3: Villains" storyline. The episode, which was originally titled "War", is the final episode of the "Villains" story arc, and was the last episode to be written and produced by Jeph Loeb prior to his departure from Heroes in November 2008.

Dual (Sampha EP)

Dual is an EP released in July 2013 by British electronic music singer, songwriter and producer Sampha from Morden, South London, United Kingdom.

Dual (category theory)

In category theory, a branch of mathematics, duality is a correspondence between the properties of a category C and the dual properties of the opposite category C. Given a statement regarding the category C, by interchanging the source and target of each morphism as well as interchanging the order of composing two morphisms, a corresponding dual statement is obtained regarding the opposite category C. Duality, as such, is the assertion that truth is invariant under this operation on statements. In other words, if a statement is true about C, then its dual statement is true about C. Also, if a statement is false about C, then its dual has to be false about C.

Given a concrete category C, it is often the case that the opposite category C per se is abstract. C need not be a category that arises from mathematical practice. In this case, another category D is also termed to be in duality with C if D and C are equivalent as categories.

In the case when C and its opposite C are equivalent, such a category is self-dual.

DUAL (cognitive architecture)

DUAL is a general cognitive architecture integrating the connectionist and symbolic approaches at the micro level. DUAL is based on decentralized representation and emergent computation. It was inspired by the Society of Mind idea proposed by Marvin Minsky but departs from the initial proposal in many ways. Computations in DUAL emerge from the interaction of many micro-agents each of which is hybrid symbolic/connectionist device. The agents exchange messages and activation via links that can be learnt and modified, they form coalitions which collectively represent concepts, episodes, and facts.

Several models have been developed on the basis of DUAL. These include: AMBR (a model of analogy-making and memory), JUDGEMAP (a model of judgment), PEAN (a model of perception), etc.

DUAL is developed by a team at the New Bulgarian University led by Boicho Kokinov. The second version was co-authored by Alexander Petrov. The third version is co-authored by Georgi Petkov and Ivan Vankov.

Dual (album)

Dual is an album by four acclaimed Irish and Scottish musicians: Éamonn Doorley, Muireann Nic Amhlaoibh (both prominently of Danú), Julie Fowlis and Ross Martin.

The artists released the album in October 2008 on their official websites. The album was planned to project the similarities and differences between the Irish and Scottish Gaelic song traditions. The album features Scottish waulking songs such as Alasdair Mhic Cholla Ghasda, and oddly an Irish Gaelic equivalent to the Gaidhlig Puirt a Beul. The songs are set in a traditional/folk accompaniment, very different from the recorded versions of a few of the songs by the likes of Capercaillie and Clannad.

The four musicians have been playing music together since a sing-song at the Tønder Festival in 2003. The four-piece has toured together twice a year both in Ireland and Scotland. Julie and Muireann have had very similar upbringings and found their music and languages shared many common threads. Hence the name, Dual, which means "to braid, to twine, inheritance or native" in both Irish Gaelic and Scottish Gaelic. The album features songs in Irish and Scots-Gaelic, and tunes from both cultures.

Usage examples of "dual".

Mussolini was then inclined to accept a role in a dual court arbitrage and Ciano made a proposal to Ribbentropp to that effect.

This Groslot, whose dual position was one of the singularities of this period--when Reformers themselves owned abbeys--Groslot, the Jacques Coeur of Orleans, one of the richest burghers of the day, did not bequeath his name to the house, for in after years it was called Le Bailliage, having been, undoubtedly, purchased either by the heirs of the Crown or by the provinces as the proper place in which to hold the legal courts.

South of the city, the Ajand River divided into its twin branches, and Bozo followed the southerly curve of the dual waterway as long as its twists and turns did not cause him to turn aside from the direction he pursued with unswerving purpose.

As we shot through the lights on the dual carriageway at Cheadle, he made a kamikaze run across three lanes of traffic to hit the motorway intersection.

A landfill site, a laundrette in some charmless town, a lay-by off a dual carriageway, a wood at night.

First, Apollonius and Lycaon represent the dual nature of the loup-garou.

The cosmogonies of the Delta: Sibu and Nait, Osiris and Isis, SU and Nephthys--Heliopolis and its theological schools: Ra, his identification with Horus, his dual nature, and the conception of Atumu--The Heliopolitan Enneads: formation of the Great Ennead--Thot and the Hermopolitan Ennead: creation by articulate words and by voice alone--Diffusion of the Enneads: their connection with the local triads, the god One and the god Eight--The one and only gods.

Amidst the strain and the olibanum fumes that act of vanishing in the clock might easily have been a dual hallucination.

The reflector family: single, dual, paraboloid, spherical, cylindrical, off-set, multi-beam, contoured, hybrid, tracking .

None saw any contradiction whatsoever in the dual personality of their respected rabbinic authority and saint.

She also remembered how stubbornly she had refused to accept the change at first, finally giving in after a few failed lessons when she had repeatedly lost control of the rotorcraft and would have crashed had it not been for the instructor and the dual controls of the small trainer.

Kabbalah teaches us and empowers us to integrate the dual aspects of our being that are our legacy from the primordial Vessel by transforming desire to receive for ourselves alone into desire to receive for the purpose of sharing.

Since then, their sisterline had reaped the dual benefit of yada labor and extra coin for the family coffers.

He saw little electric blue explosions erupt from his yukata and he thought his heart would melt, but it had its own built-in surge protector and he survived their dual death.

This was because of the dual authorities of Barding and ruling authorities, both of which shared governance of their various peoples, and which by their complex nature mitigated against absolute rule.