Definition of triplex in English:



  • 1British trademark [mass noun] Toughened or laminated safety glass, used especially for car windows.

    • ‘Main Biaglass production is opal triplex glass, which provides extraordinarily soft and true light.’
    • ‘The logo is different than the old 50s'-60's Triplex logo some remember, generally described as a heart with three X's inside arranged in a triangle.’
  • 2North American A building divided into three self-contained residences.

    • ‘Duplexes must cost no more than $135,000, triplexes less than $185,000, fourplexes under $190,000 and a fiveplex must come in under $205,000.’
    • ‘The pony-tailed property owner had previously bought and sold properties without incident and had successfully bid on two triplexes in the Pointe.’
    • ‘Next year, the UEC will establish a sample green roof atop a triplex to encourage surrounding homeowners to follow suit.’
    • ‘Last week's three-hour public meeting about a proposed moratorium on the demolition of homes and construction of triplexes in North Vancouver City's Ottawa Gardens neighbourhood drew a crowd of some 60 area residents.’
    • ‘Systems serving a single family dwelling, duplex, or triplex, require an installation permit from the local health department.’
    • ‘They looked on in disbelief at the once-majestic greystone triplex across from Fletcher's Field: the triplex on one of the city's most fashionable streets had fallen inexplicably into an advanced state of disrepair.’
    • ‘Vancouver and Montreal each have a style to call their own (c.f. condos, slapdash; and triplexes, ornately balconied).’
    • ‘The certificate is currently only required for triplexes and apartments.’
    • ‘The local health department issues permits for systems serving single-family homes, duplexes, or triplexes.’
    • ‘He helped us convert the home into a triplex that we could rent out.’
    • ‘Restrictions on triplex construction will remain in place until city staff completes a final analysis on the effect of density change in the area.’
    • ‘He said he wants to see a moratorium on housing demolition and the construction of triplexes until the impact of the increased density allowances are better understood by council and area residents.’
    • ‘In bigger buildings, tax increases are divided between many tenants, but just imagine the impact of a big tax increase on tenants in a duplex or triplex.’
    1. 2.1A flat on three floors.
      • ‘Triplexes can be designed to be livable and, compared to single-family homes, they are an affordable way to get into this community, he said.’
      • ‘Physical analysis of TNR-containing DNA strands showed that they readily adopt unusual secondary structures, such as hairpins, triplexes, quadruplexes, and slipped-strand conformations (summarized in SINDEN 1999).’
      • ‘The pony-tailed property owner had previously bought and sold properties without incident and had successfully bid on two triplexes in the Pointe.’
      • ‘Lands and Fair Trading Minister Doug Shave said the changes would streamline and clarify legal provisions relating to ownership and insurance of properties such as duplexes, triplexes, villas and townhouses.’
      • ‘I'm sure lots of lesbians have no problem having cars, cash, triplexes or being part of this system, but why is it that so many of us do?’
      • ‘The certificate is currently only required for triplexes and apartments.’
      • ‘We were looking for a duplex or a triplex, but triplexes are really hard to come across.’
      • ‘Apparently, Moby sprung for one of the penthouse triplexes in the building, which the 7 Essex website says carry an asking price of $2,395,000.’
      • ‘The assay can detect specific hybridization between single-stranded probes and non-denatured double-stranded targets to form triplexes, thus obviating the need to denature the targets.’
      • ‘Investment properties such as duplexes, triplexes, and quadplexes are available as well.’
      • ‘Duplexes must cost no more than $135,000, triplexes less than $185,000, fourplexes under $190,000 and a fiveplex must come in under $205,000.’
      • ‘These studies have used the fluorescence melting technique, which we developed previously for studying the stability of triplexes and quadruplexes.’
      • ‘News that the city may be hiking property taxes on undivided properties - duplexes and triplexes - is guaranteed to anger low-income housing advocates across the city.’
      • ‘The local health department issues permits for systems serving single-family homes, duplexes, or triplexes.’
      • ‘This certificate is currently only required for triplexes and apartments.’
      • ‘which include single family dwellings, duplexes, triplexes, and apartment blocks.’
      • ‘By forming the noncanonical DNA structure (hairpins, triplexes, and quadruplexes) and taking part in the non - Watson-Crick interactions, simple sequences may play a role in maintaining the chromatin organization.’
  • 3Biochemistry
    A triple-stranded polynucleotide molecule.

    • ‘Two triplex amplification systems were designed for the tetranucleotides.’
    • ‘This involves formation of a hybrid triplex by two PNA strands and a homopurine strand of dsDNA whereas the other DNA strand is displaced from the double helix.’
    • ‘Later it was found that homopurine strands can also specifically form a DNA triplex in which the AT base pair is contacted by an A and the GC base pair by a G.’
    • ‘If this were the case, the first and third of these mechanisms must involve a stable triplex substate.’
    • ‘The inverted repeat sequences of the guanine-rich 5'-half are expected to have a higher potential of forming the hairpin triplex.’
    trio, triumvirate, triad, trinity, troika, triunity, triangle, triplex
    View synonyms


  • 1Having three parts.

    • ‘Whether maintaining greens, tees, approaches or fairways, the triplex mower has the ability to deliver results that meet golf course superintendents' high expectations.’
    • ‘It took him two hours to cut the pattern into the turf using a fairway mower for the stripes and a triplex tee mower for the stars.’
    • ‘For example, we have duplicate platforms in the triplex mowers but we have to target that while retaining functionality for all the markets.’
    • ‘The concept of this fairway mower falls between the triplex and fiveplex.’
    • ‘In 1979, a New Jersey superintendent started the trend of using a triplex to mow fairways.’
    • ‘Designed to be lightweight and maneuverable, the versatile triplex mower also is the choice of many superintendents for tees, approaches and fairways.’
    • ‘But specific features such as bedknife-to-reel knobs on the walk-behinds and an offset cutting-unit design on the triplex mowers can ensure you get the best cut possible.’
    • ‘Now, on April 1, we are launching three new triplex unedited channels.’
    • ‘But what if your spanking-new ball slices into an adjacent fairway and gets chopped and spit out by a triplex mower?’
    • ‘These cables are either duplex, triplex, or quadruplex, consisting of one, two or three insulated conductors wrapped around a bare aluminum or acsr neutral.’
    • ‘The five centimetres of the lacquered triplex door were the only degrees separating the two from each other now.’
    • ‘The flight control system is a triplex digital fly-by-wire system.’
    • ‘‘We have to have great conditions, but with 45 holes, including a 9-hole executive course, I need more efficiency than I would get with triplex mowers,’ he says.’
    • ‘Colin points out that if several cylinders are used in the pump, the pulsation frequency is a small multiple of the individual piston frequency, usually 2 for duplex and 6 for triplex pumps.’
    • ‘The triplex and biplex PCRs were combined before electrophoresis and loaded onto a single gel lane to form a pentaplex system.’
    1. 1.1Biochemistry Consisting of three polynucleotide strands linked side by side.
      • ‘Our data confirm that the polypurine TFO binds in an antiparallel orientation with respect to the polypurine DNA strand and that triplex formation requires Mg 2 + ions whereas it is inhibited by K + ions.’
      • ‘A further possible pathway of guanine quadruplex formation has also been proposed that is essentially a triplex dissociation process.’
      • ‘In the case of herpesvirus, it would seem likely that the triplex proteins, which are located between the pentons and hexons and are also released with herpesvirus pentons, perform this stabilization function.’
      • ‘In the triplex, the Hoogsteen basepaired dT strand blocks the major groove of the duplex.’
      • ‘In a striking contrast to all simulations involving four d strands, the triplex assembly is not stable in the simulation.’


  • (of electrical equipment or systems) be provided or fitted in triplicate so as to ensure reliability.

    • ‘A process controller having an operating function is provided to each of the triplexed process input/output units.’
    • ‘A single coaxial feed runs from the riser switch to the lounge triplexed plate with an extension to the Master Bedroom.’
    • ‘We have a 138-25 kV delta-Yg power transformer feeding 25 kV switchgear via 3 circuits of 25 kV - 750 kcmil triplexed cable with concentric neutrals on each phase.’
    • ‘Although it was triplexed in 1982, the interior was mostly preserved.’
    • ‘Diplexed and triplexed types have a single cable input which is selectively split to the outlet sockets.’


Early 17th century (as an adjective in the sense ‘threefold’): from Latin, threefold, from tri- three + plicare to fold. Current specific senses date from the 1920s.