dual

== English == === Alternative forms === du. (abbreviation, grammar) === Etymology === Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis. === Pronunciation === (Received Pronunciation) enPR: dyo͞oʹəl, jo͞oʹəl (yod-coalescence) IPA(key): /ˈd͡ʒuː.əl/ (non-yod-coalescence) IPA(key): /ˈdjuː.əl/ (General American) enPR: d(y)o͞o'əl; IPA(key): /ˈdul/, /ˈd(j)u.əl/ Homophones: duel; jewel (yod-coalescence) Rhymes: -uːəl === Adjective === dual (not comparable) Characterized by having two (usually equivalent) components. Synonyms: double, twin; see also Thesaurus:dual a dual-motor vehicle Pertaining to two, pertaining to a pair of. Synonyms: double, duplicate; see also Thesaurus:twofold dual engine failure dual citizenship (grammar) Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes. Coordinate terms: singular, trial, plural (mathematics, physics) Exhibiting duality. (linear algebra) Being the space of all linear functionals of (some other space). (category theory) Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms. Synonym: opposite ==== Derived terms ==== ==== Translations ==== === Noun === 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. (grammar) The dual 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. (wrestling) A head-to-head match or meet between two teams, such as two high schools or colleges. ==== Derived terms ==== ==== Translations ==== ==== See also ==== (grammatical numbers) grammatical number; singular, dual, trial, quadral, quintal, paucal, plural (Category: en:Grammar) unal duel === Verb === dual (third-person singular simple present duals, present participle (US) dualing or (UK) dualling, simple past and past participle (US) dualed or (UK) dualled) (transitive) To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway. === Anagrams === Auld, Daul, Dula, auld, laud, udal == French == === Pronunciation === IPA(key): /dɥal/ === Adjective === dual (feminine duale, masculine plural duaux, feminine plural duales) dual === Noun === dual m (plural duaux) dual === Further reading === “dual”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012 == German == === Pronunciation === IPA(key): [duˈaːl] Hyphenation: du‧al Rhymes: -aːl === Adjective === dual (strong nominative masculine singular dualer, not comparable) dual ==== Declension ==== === Further reading === “dual” in Duden online “dual”, in Digitales Wörterbuch der deutschen Sprache‎[2] (in German) == Irish == === Pronunciation === IPA(key): /d̪ˠuəl̪ˠ/, /d̪ˠuəlˠ/ === Etymology 1 === 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). ==== Noun ==== dual m (genitive singular duail, nominative plural duail) lock, tress Synonyms: dlaoi, dual gruaige wisp, tuft Synonym: dlaoi ply, strand twist, twine spiral, whirl ===== Declension ===== ===== Derived terms ===== dualach1 duailín, dualán ==== Verb ==== dual (present analytic dualann, future analytic dualfaidh, verbal noun dualadh, past participle dualta) (transitive) twine (transitive) braid, coil (transitive) interlace, fold ===== Conjugation ===== === Etymology 2 === (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) ==== Noun ==== dual m (genitive singular duail, nominative plural duail) dowel knot (in timber) Synonyms: alt, cranra ===== Declension ===== ===== Derived terms ===== dualach2 dualbhata === Etymology 3 === From Old Irish dúal (“that which belongs or is proper to an individual by nature or descent”), from Proto-Indo-European *dʰewgʰ-. ==== Adjective ==== 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. proper, fitting in the natural order of things fated possible ===== Declension ===== ===== Related terms ===== dualgas === Mutation === === Further reading === Ó Dónaill, Niall (1977), “dual”, in Foclóir Gaeilge–Béarla [Irish–English Dictionary], Dublin: An Gúm, →ISBN Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “1 dúal”, in eDIL: Electronic Dictionary of the Irish Language Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “2 dúal”, in eDIL: Electronic Dictionary of the Irish Language de Bhaldraithe, Tomás (1959), “dual”, in English-Irish Dictionary, An Gúm Finck, F. N. (1899), Die araner mundart [The Aran Dialect] (in German), Zweiter Band: Wörterbuch [Second volume: Dictionary], Marburg: Elwert’sche Verlagsbuchhandlung, page 72 “dual”, in New English-Irish Dictionary, Foras na Gaeilge, 2013–2026 == Portuguese == === Pronunciation === Rhymes: (Portugal) -al, (Brazil) -aw Hyphenation: du‧al === Adjective === dual m or f (plural duais, not comparable) dual (having two elements) ==== Derived terms ==== dualidade dualmente === Further reading === “dual”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026 “dual”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026 == Romanian == === Etymology === Borrowed from French duel, from Latin dualis. === Noun === dual n (plural duale) (grammar) dual ==== Declension ==== == Scottish Gaelic == === Etymology 1 === From Old Irish dúal (“that which belongs or is proper to an individual by nature or descent”), from Proto-Indo-European *dʰewgʰ-. ==== Pronunciation ==== IPA(key): /t̪uəɫ̪/ ==== Adjective ==== dual (comparative nas duaile, superlative as duaile) hereditary usual, natural 'S dual do phoileasman a bhith amharasach. ― It's natural for a policeman to be suspicious. ===== Derived terms ===== bu dual do dh'isean an ròin a dhol chun na mara ==== Noun ==== dual m (genitive singular duail, plural dualan) birthright Synonym: còir-bhreith due something which is natural and/or usual === Etymology 2 === From Old Irish dúal (“tress, lock of hair”), from Proto-Celtic *doklos, from Proto-Indo-European *doḱlos. ==== Noun ==== dual m (genitive singular duail, plural dualan) curl, lock of hair plait, strand, braid, or fold ringlet ==== Verb ==== dual (past dhual, future dualidh, verbal noun dualadh, past participle dualte) plait, twist loop, curl fold link === Mutation === === References === MacBain, Alexander; Mackay, Eneas (1911), “dual”, in An Etymological Dictionary of the Gaelic Language‎[3], Stirling, →ISBN, page 145 === Further reading === Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “1 dúal”, in eDIL: Electronic Dictionary of the Irish Language Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “2 dúal”, in eDIL: Electronic Dictionary of the Irish Language == Spanish == === Etymology === From Latin duālis. === Pronunciation === IPA(key): /ˈdwal/ [ˈd̪wal] Rhymes: -al Syllabification: dual === Adjective === dual m or f (masculine and feminine plural duales) dual (grammar) dual ==== Derived terms ==== ==== Related terms ==== === Further reading === “dual”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025 == Tagalog == === Alternative forms === doal — obsolete, Spanish-based spelling === Pronunciation === (Standard Tagalog) IPA(key): /duˈʔal/ [d̪ʊˈʔal] Rhymes: -al IPA(key): /ˈduʔal/ [ˈd̪uː.ʔɐl] (obsolete) Syllabification: du‧al === Noun === duál (Baybayin spelling ᜇᜓᜀᜎ᜔) alternative form of duwal