quadruplicate

1. not comparablehaving four parts

   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 […]

   1903, H.G. Wells, Mankind in the Making

2. not comparablefour times over, multiplied by four

   […] Fortune, who delights in making the miner or the lumber-man a quadruplicate millionaire and in "busting" the railroad king.

   1891, Rudyard Kipling, American Notes

plural quadruplicates

1. One of four copies of something.

   quadruplicates of the receipts

   1 more example

   […] quadruplicates, were run only for those triplicates yielding 20 % or more of the population. Quadruplicates were examined for combinations where each of the verbal and gesture / sign language variables accounted for 5 % or more of the […]

   1979, AAESPH Review of the American Association for the Education of the Severely/Profoundly Handicapped, volume 4, page 47

2. In quadruplicate: four times over, in four copies.

   Four times Cupid's debtor I-- / Bankrupt in quadruplicate.

   c. 1886, Rudyard Kipling, The Lovers' Litany

present singular third person quadruplicates · participle present quadruplicating · participle past quadruplicated · past quadruplicated

1. To replicate four times; to make fourfold; to quadruple.