[ 'trɪplɛks ]
■ noun
1》 ( Triplex ) Brit. trademark toughened or laminated safety glass, used especially for car windows.
2》 N. Amer. a building divided into three self-contained residences.
3》 Biochemistry a triple-stranded polynucleotide molecule.
■ verb ( be ~ed ) (of electrical equipment or systems) be provided or fitted in triplicate so as to ensure reliability.
Origin
C17: from L., 'threefold', from tri- 'three' + plicare 'to fold'.