Definition of triplex in English:

Share this entry


Pronunciation: /ˈtrɪplɛks/


1 (Triplex) [mass noun] British trademark Toughened or laminated safety glass, used especially for car windows.
Example sentences
  • 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.
Example sentences
  • The certificate is currently only required for triplexes and apartments.
  • 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.
  • The pony-tailed property owner had previously bought and sold properties without incident and had successfully bid on two triplexes in the Pointe.
2.1A flat on three floors.
Example sentences
  • The local health department issues permits for systems serving single-family homes, duplexes, or triplexes.
  • The pony-tailed property owner had previously bought and sold properties without incident and had successfully bid on two triplexes in the Pointe.
  • We were looking for a duplex or a triplex, but triplexes are really hard to come across.
3 Biochemistry A triple-stranded polynucleotide molecule.
Example sentences
  • 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.
  • The inverted repeat sequences of the guanine-rich 5'-half are expected to have a higher potential of forming the hairpin triplex.
  • 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.


1Having three parts.
Example sentences
  • ‘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.
  • For example, we have duplicate platforms in the triplex mowers but we have to target that while retaining functionality for all the markets.
  • 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.
1.1 Biochemistry Consisting of three polynucleotide strands linked side by side.
Example sentences
  • 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.
  • In a striking contrast to all simulations involving four d strands, the triplex assembly is not stable in the simulation.
  • 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.


(be triplexed)
(Of electrical equipment or systems) be provided or fitted in triplicate so as to ensure reliability.
Example sentences
  • Diplexed and triplexed types have a single cable input which is selectively split to the outlet sockets.
  • A single coaxial feed runs from the riser switch to the lounge triplexed plate with an extension to the Master Bedroom.
  • Although it was triplexed in 1982, the interior was mostly preserved.


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.

For editors and proofreaders

Line breaks: trip|lex

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.