dual
EnglishEdit
Alternative formsEdit
- du. (abbreviation, grammar)
EtymologyEdit
Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis
PronunciationEdit
- (UK) enPR: dyo͞o'əl, djo͞o'əl; IPA(key): /ˈdjuː.əl/, /ˈdʒuː.əl/
- (US) enPR: d(y)o͞o'əl; IPA(key): /ˈd(j)uː.əl/
Audio (UK) (file) - Rhymes: -ʊəl
- Homophone: duel
AdjectiveEdit
dual (not comparable)
- Exhibiting duality; characterized by having two (usually equivalent) components.
- Acting as a counterpart.
- Double.
- a dual-headed computer
- (grammar) 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.
- (linear algebra) Being the space of all linear functionals of (some other space).
- 2012, Doug Fisher, Hans-J. Lenz, Learning from Data: Artificial Intelligence and Statistics V, Springer Science & Business Media →ISBN, page 81
- Accordingly, a hyperplane in the sample space is dual to a subspace in the variable space.
- 2012, Doug Fisher, Hans-J. Lenz, Learning from Data: Artificial Intelligence and Statistics V, Springer Science & Business Media →ISBN, page 81
- (category theory) Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms.
- 1992, Colin McLarty, Elementary Categories, Elementary Toposes, Clarendon Press →ISBN, page 77
- Every category is dual to its own dual, so if a statement holds in all categories so does its dual.
- 1992, Colin McLarty, Elementary Categories, Elementary Toposes, Clarendon Press →ISBN, page 77
SynonymsEdit
- (having two components): double, twin; see also Thesaurus:dual
- (double): double, duplicate; see also Thesaurus:twofold
- (category theory): opposite
Derived termsEdit
TranslationsEdit
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- The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout § Translations.
NounEdit
dual (plural duals)
- Of an item that is one of a pair, the other item in the pair.
- (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.
- (grammar) 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.
- (mathematics) 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.
TranslationsEdit
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See alsoEdit
- (grammatical numbers) grammatical number; singular, dual, trial, quadral, paucal, plural (Category: en:Grammar)
- unal
- duel
VerbEdit
dual (third-person singular simple present duals, present participle (UK) dualling or (US) dualing, simple past and past participle (UK) dualled or (US) dualed)
- (transitive) To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.
- 1994, Great Britain. Parliament. House of Commons, Parliamentary Debates
- I have to declare an interest and I do so with some ambivalence because if the road is dualled it is likely to take half of my front garden.
- 1998, Great Britain. Parliament. House of Commons, Parliamentary Debates
- Way back in 1971, the Government of the day first published plans for a high-capacity road network, which included the dualling of the A47 from King's Lynn to Great Yarmouth.
- 2006, David Lowe, Intermodal Freight Transport, p. 163
- The power generation and propulsion systems are dualled to accommodate component failure and maintain propulsion at reduced speed should any part of one system be lost.
- 1994, Great Britain. Parliament. House of Commons, Parliamentary Debates
AnagramsEdit
GermanEdit
PronunciationEdit
AdjectiveEdit
dual (not comparable)
DeclensionEdit
number & gender | singular | plural | |||
---|---|---|---|---|---|
masculine | feminine | neuter | all genders | ||
predicative | er ist dual | sie ist dual | es ist dual | sie sind dual | |
strong declension (without article) |
nominative | dualer | duale | duales | duale |
genitive | dualen | dualer | dualen | dualer | |
dative | dualem | dualer | dualem | dualen | |
accusative | dualen | duale | duales | duale | |
weak declension (with definite article) |
nominative | der duale | die duale | das duale | die dualen |
genitive | des dualen | der dualen | des dualen | der dualen | |
dative | dem dualen | der dualen | dem dualen | den dualen | |
accusative | den dualen | die duale | das duale | die dualen | |
mixed declension (with indefinite article) |
nominative | ein dualer | eine duale | ein duales | (keine) dualen |
genitive | eines dualen | einer dualen | eines dualen | (keiner) dualen | |
dative | einem dualen | einer dualen | einem dualen | (keinen) dualen | |
accusative | einen dualen | eine duale | ein duales | (keine) dualen |
Further readingEdit
- “dual” in Duden online
IrishEdit
PronunciationEdit
Etymology 1Edit
From Old Irish dúal (“tress, lock of hair”), from Proto-Celtic *doklos, from Proto-Indo-European *doḱlos (compare Icelandic tagl (“horse’s tail”), Old English tæġl, English tail).
NounEdit
dual m (genitive singular duail, nominative plural duail)
- lock, tress
- Synonyms: dlaoi, dual gruaige
- wisp, tuft
- Synonym: dlaoi
- ply, strand
- twist, twine
- spiral, whirl
DeclensionEdit
Derived termsEdit
VerbEdit
dual (present analytic dualann, future analytic dualfaidh, verbal noun dualadh, past participle dualta)
- (transitive) twine
- (transitive) braid, coil
- (transitive) interlace, fold
ConjugationEdit
* Indirect relative
† Archaic or dialect form
‡‡ Dependent form used with particles that trigger eclipsis
Etymology 2Edit
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
NounEdit
dual m (genitive singular duail, nominative plural duail)
DeclensionEdit
Derived termsEdit
Etymology 3Edit
From Old Irish dúal (“that which belongs or is proper to an individual by nature or descent”), from Proto-Indo-European *dʰewgʰ-.
AdjectiveEdit
dual (genitive singular masculine duail, genitive singular feminine duaile, plural duala, comparative duaile)
- native, natural
- Is dual dó a bheith leisciúil. ― He is naturally lazy.
- Ní dual don diabhal bheith díomhaoin.
- No rest for the wicked.
- (literally, “It is not in the devil's nature to be idle.”)
- proper, fitting
- in the natural order of things
- fated
- possible
DeclensionEdit
Singular | Plural (m/f) | |||
---|---|---|---|---|
Positive | Masculine | Feminine | (strong noun) | (weak noun) |
Nominative | dual | dhual | duala; dhuala² | |
Vocative | dhuail | duala | ||
Genitive | duale | duala | dual | |
Dative | dual; dhual¹ |
dhual; dhuail (archaic) |
duala; dhuala² | |
Comparative | níos duale | |||
Superlative | is duale |
¹ When the preceding noun is lenited and governed by the definite article.
² When the preceding noun ends in a slender consonant.
MutationEdit
Irish mutation | ||
---|---|---|
Radical | Lenition | Eclipsis |
dual | dhual | ndual |
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. |
Further readingEdit
- "dual" in Foclóir Gaeilge–Béarla, An Gúm, 1977, by Niall Ó Dónaill.
- Gregory Toner, Maire Ní Mhaonaigh, Sharon Arbuthnot, Dagmar Wodtko, Maire-Luise Theuerkauf, editors (2019) , “1 dúal”, in eDIL: Electronic Dictionary of the Irish Language
- Gregory Toner, Maire Ní Mhaonaigh, Sharon Arbuthnot, Dagmar Wodtko, Maire-Luise Theuerkauf, editors (2019) , “2 dúal”, in eDIL: Electronic Dictionary of the Irish Language
- Entries containing “dual” in English-Irish Dictionary, An Gúm, 1959, by Tomás de Bhaldraithe.
- Entries containing “dual” in New English-Irish Dictionary by Foras na Gaeilge.
PortugueseEdit
AdjectiveEdit
dual m or f (plural duais, comparable)
- dual (having two elements)
Scottish GaelicEdit
Etymology 1Edit
From Old Irish dúal (“that which belongs or is proper to an individual by nature or descent”), from Proto-Indo-European *dʰewgʰ-.
PronunciationEdit
AdjectiveEdit
dual (comparative duaile)
- hereditary
- usual, natural
- 'S dual do phoileasman a bhith amharasach. ― It's natural for a policeman to be suspicious.
NounEdit
dual m (genitive singular duail, plural dualan)
- birthright
- Synonym: còir-bhreith
- due
- something which is natural and/or usual
Derived termsEdit
Etymology 2Edit
From Old Irish dúal (“tress, lock of hair”), from Proto-Celtic *doklos, from Proto-Indo-European *doḱlos.
NounEdit
dual m (genitive singular duail, plural dualan)
VerbEdit
dual (past dhual, future dualidh, verbal noun dualadh, past participle dualte)
MutationEdit
Scottish Gaelic mutation | |
---|---|
Radical | Lenition |
dual | dhual |
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. |
ReferencesEdit
- MacBain, Alexander; Mackay, Eneas (1911) , “dual”, in An Etymological Dictionary of the Gaelic Language, Stirling, →ISBN, page 145
Further readingEdit
- Gregory Toner, Maire Ní Mhaonaigh, Sharon Arbuthnot, Dagmar Wodtko, Maire-Luise Theuerkauf, editors (2019) , “1 dúal”, in eDIL: Electronic Dictionary of the Irish Language
- Gregory Toner, Maire Ní Mhaonaigh, Sharon Arbuthnot, Dagmar Wodtko, Maire-Luise Theuerkauf, editors (2019) , “2 dúal”, in eDIL: Electronic Dictionary of the Irish Language
SpanishEdit
PronunciationEdit
- Rhymes: -al
AdjectiveEdit
dual (plural duales)