duplex

See also: Duplex and dúplex

English

Etymology

PIE word
*dwóh₁

Borrowed from Latin duplex (“double, two-fold”), from duo (“two”) + plico (“fold together”); compare the roots of διπλόος (diplóos, “double”); compare also πλέκω (plékō, “twist, braid”). By surface analysis, duo- +‎ -plex.

Pronunciation

• (US) enPR: do͞o'plĕks, IPA^(key): /ˈdu.plɛks/

• Audio (Southern England):

  (file)

• Rhymes: -uːplɛks

Adjective

duplex (not comparable)

1. Double; made up of two parts.
   1. (architecture) Having two floors.
   2. (architecture) Having two units, divisions, suites, or apartments.
   3. (metallurgy) Of stainless steel: having a structure containing austenite and ferrite in roughly equal proportions.
      • 2010, Harold M. Cobb, The History of Stainless Steel, Materials Park, O.H.: ASM International, →ISBN, page 189:

        Duplex stainless steels have been classified according to the first period (1930–1960) and second period (1960–1990). The designations for these duplex alloys in the United States have been primarily according to Unified Numbering System (UNS) numbers in the S3xxx.x series.

2. (telecommunications) Bidirectional (in two directions).

   Antonyms: simplex, unidirectional

   duplex telegraphy

3. (soil science) Having horizons with contrasting textures.
   • 1977, Australian Journal of Botany, volume 25, page 462:

     Soils are duplex, sandy and solodic. The dominant trees are the stringybark eucalypts […]

Hyponyms

(bidirectional):

• full duplex
• half-duplex
• semiduplex

Derived terms

• duplexity
• duplex nail
• echoplex
• full duplex
• half-duplex
• heteroduplex
• homoduplex
• interduplex
• intraduplex
• multiduplex
• nonduplex
• semiduplex
• superduplex

 

Related terms

• contraplex
• diplex
• duplex escapement
• duplex lathe
• duplex pumping engine
• duplex querela
• duplex watch

 

Translations

made up of two parts

• Bulgarian: двоен (bg) (dvoen), сдвоен (sdvoen)
• Chinese:

  Mandarin: 雙重的／双重的

• Esperanto: dupleksa
• Finnish: kaksiosainen (fi)
• Greek: διπλός (el) m (diplós), διμερής (el) m (dimerís)

architecture: having two floors

• Finnish: kaksikerroksinen

architecture: having two units, divisions, suites, or apartments

• Finnish: pari- (fi)

metallurgy: of stainless steel, containing austenite and ferrite in roughly equal proportions

• Finnish: duplex- (fi)

telecommunication: in two directions

• Bulgarian: двупосочен (dvuposočen)
• Chinese:

  Mandarin: 雙向的／双向的

• Finnish: kaksisuuntainen (fi), dupleksi
• Greek: αμφίδρομος (el) m (amfídromos)
• Scottish Gaelic: dà-shlighe
• Spanish: dúplex (es) m

soil science: having horizons with contrasting textures

A duplex (sense 1) in Bowling Green, Ohio, USA

Noun

duplex (plural duplexes or duplices)

1. (US, Canada, Australia) A house made up of two dwelling units.
   • 2020, Akwaeke Emezi, The Death of Vivek Oji, Faber & Faber Ltd, page 53:

     The house had been renovated into a duplex and he’d put in a phone line.

2. (US) A dwelling unit with two floors.
3. (philately) A cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting.
4. (juggling) A throwing motion where two balls are thrown with one hand at the same time.
5. (biochemistry) A double-stranded polynucleotide.
6. (geology) A system of multiple thrust faults bounded above and below by a roof thrust and floor thrust.
   • 1993, David J. Lidke, Jack Burton Epstein, Chester A. Wallace, U.S. Geological Survey Bulletin, page 16:

     In contrast, the folds in the overlying lithotectonic unit 4 are larger and are cut by a series of faults in a duplex.

   • 1995, Robert D. Hatcher, Structural Geology: Principles, Concepts, and Problems, page 211:

     It has been noted, using a combination of surface geologic and seismic reflection data, that a duplex, although formed in response to movement of a thrust sheet, frequently arches the thrust sheet as the duplex is built by duplication of rocks beneath it […]

Related terms

Related terms

• diplex
• 2-plex
• oligoduplex
• quadruplex
• triplex

Translations

house

• Finnish: paritalo (fi)
• French: duplex (fr) m
• Georgian: დუპლექსი (duṗleksi)
• German: Doppelhaus (de) n
• Greek: διπλοκατοικία (el) f (diplokatoikía)
• Italian: bifamiliare (it) f
• Norwegian:

  Bokmål: tomannsbolig (no)

  Nynorsk: tomannsbustad

• Polish: bliźniak (pl) m
• Spanish: dúplex (es) m
• Swedish: parhus (sv) n; etagevåning c

dwelling unit with two floors

philately: double cancellation

• Finnish: duplex-leima
• French: flamme postale (fr) f, flamme (fr) f

juggling: throwing motion

• French: duplex (fr) m

biology: double-stranded polynucleotide

• Finnish: dupleksi

system of multiple thrust faults

See also

• bungalow
• maisonette
• semi-detached
• townhouse
• rowhouse

Verb

duplex (third-person singular simple present duplexes, present participle duplexing, simple past and past participle duplexed)

1. To make duplex.
2. To make into a duplex.
3. (juggling) To make a series of duplex throws.

Related terms

terms related to duplex

• double
• duplicity
• multiplex
• quadruplex
• simplex
• single
• triple
• triplex

Further reading

• Duplex on Wikipedia.Wikipedia
• Duplex stainless steel on Wikipedia.Wikipedia

French

Etymology

Borrowed from Latin duplex, see above.

Pronunciation

• IPA^(key): /dy.plɛks/

• Audio:

  (file)

• Audio (Canada):

  (file)

Noun

duplex m (plural duplex)

1. a link between two points, such as a cable or a wire
2. duplex, maisonette (dwelling)

Derived terms

• duplexer

Further reading

• “duplex”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

Italian

Etymology

Unadapted borrowing from Latin duplex.

Noun

duplex m (invariable)

1. (telecommunications) duplex (communications link allowing simultaneous sending and receiving)
2. (telephony) party line
3. (telephony) telephone or telephone user on a party line
4. (metallurgy) duplex process (for refining steel)
5. (architecture) two-story residence with separated living and sleeping areas
6. (typography) duplex matrix (matrix bearing two signs next to each other)

Latin

Latin numbers ^(edit)

←  1	II 2	3  →
Cardinal: duo     Ordinal: secundus, alter     Adverbial: bis     Proportional: duplus     Multiplier: duplex, alterplex, biplex     Distributive: bīnus     Collective: bīniō     Fractional: dīmidius, sēmis

Etymology

From Proto-Italic *dwipleks, formed from duo (“two”) +‎ -plex (“-fold”).

Pronunciation

• (Classical Latin) IPA^(key): /ˈdu.pleks/, [ˈd̪ʊpɫ̪ɛks̠] or IPA^(key): /ˈdup.leks/, [ˈd̪ʊpɫ̪ɛks̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈdu.pleks/, [ˈd̪uːpleks] or IPA^(key): /ˈdup.leks/, [ˈd̪upleks]

Adjective

duplex (genitive duplicis, adverb dupliciter); third-declension one-termination adjective

1. twofold, two, double
   • 44 BCE, Cicero, De Officiis 1.104:

     Duplex omnīnō est iocandī genus, ūnum illīberāle, petulāns, flāgitiōsum, obscēnum, alterum ēlegāns, urbānum, ingeniōsum, facētum.

     In all, there are two kinds of joking: one ignoble, irreverent, shameful, obscene; the other elegant, refined, ingenious, witty.

     (literally, “In all, the kind of joking is twofold: …”)

   • 29 BCE – 19 BCE, Virgil, Aeneid 4.469–470:

     [...] Eumenidum velutī dēmēns videt agmina Penthēus,
     et sōlem geminum et duplicīs sē ostendere Thēbās [...].

     Just as the deranged Pentheus sees the ranks of Eumenides, and a twin sun, and Thebes to show herself twofold.
     (Variant accusative plural: duplicīs. For context, see: The Bacchae.)

2. bipartite, cloven
3. ambiguous

Declension

Third-declension one-termination adjective.

	singular			plural
	masc./fem.	neuter		masc./fem.	neuter
nominative	duplex			duplicēs	duplicia
genitive	duplicis			duplicium
dative	duplicī			duplicibus
accusative	duplicem	duplex		duplicēs	duplicia
ablative	duplicī			duplicibus
vocative	duplex			duplicēs	duplicia

• Sg.Abl. sometimes duplice.

Derived terms

• duplicō

 

Descendants

• Galician: dobre (possibly)
• Spanish: doble (possibly)
• → English: duplex
• → French: duplex
• → Italian: duplice, duplex
• → Spanish: dúplex

References

• “duplex”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “duplex”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• duplex in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• duplex in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• Carl Meißner, Henry William Auden (1894) Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • a twofold tradition prevails on this subject: duplex est memoria de aliqua re
    
  • in two, three columns: agmine duplici, triplici
    

Romanian

Etymology

Borrowed from French duplex.

Noun

duplex n (plural duplexuri)

1. duplex

Declension

	singular			plural
	indefinite	definite		indefinite	definite
nominative-accusative	duplex	duplexul		duplexuri	duplexurile
genitive-dative	duplex	duplexului		duplexuri	duplexurilor
vocative	duplexule			duplexurilor