Definition from Wiktionary, the free dictionary quadruplicate
(not comparable) - having four parts - 1903: H.G. Wells, Mankind
in the Making - The small schools might specialize upon the type
locally most desirable, the larger might group its triplicate
(or quadruplicate) system of sustained and serious courses about
a common Library... - four times over, multiplied by four -
1891: Rudyard Kipling, American Notes - ... Fortune, who
delights in making the miner or the lumber-man a quadruplicate
millionaire and in "busting" the railroad king. quadruplicate
(plural quadruplicates) - in quadruplicate: four times over, in
four copies - c.1886: Rudyard Kipling, "The Lovers' Litany" -
Four times Cupid's debtor I-- / Bankrupt in quadruplicate. See
also  - second-person plural present indicative of quadruplicare
- second-person plural imperative of quadruplicare - Feminine
plural of quadruplicato - first-person plural present active
imperative of quadruplicō