triplex

 
Pronunciation: /ˈtrɪplɛks/

noun

  • 1 (Triplex) [mass noun] British trademark toughened or laminated safety glass, used especially for car windows.
  • 2North American a building divided into three self-contained residences.
  • a flat on three floors.
  • 3 Biochemistry a triple-stranded polynucleotide molecule.

adjective

  • having three parts.
  • Biochemistry consisting of three polynucleotide strands linked side by side.

verb

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

Origin:

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