IPA: /kwɒdrəˈpjuːleɪʃən/
KK: /kwɑːdrəˈpjuːleɪʃən/
The act of multiplying something by four.
The quadruplication of the data helped improve the accuracy of the results.
Quadruplication → It is formed from "quadru-" (from Latin "quadrupes", meaning four-footed) and "-plicare" (meaning to fold). The word refers to the act of folding or multiplying something four times.
Think of 'four' ('quadru-') being 'folded' ('plicare') — that's why quadruplication means to multiply something four times.