"quadruplicate" in the noun sense
1. quadruplicate
any four copies any of four things that correspond to one another exactly
"it was signed in quadruplicate"
"quadruplicate" in the verb sense
1. quadruplicate
reproduce fourfold
"quadruplicate the bill"
"quadruplicate" in the adjective sense
1. quadruple, quadruplicate, quadruplex, fourfold, four-fold
having four units or components
"quadruple rhythm has four beats per measure"
"quadruplex wire"
Source: WordNet® (An amazing lexical database of English)
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