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quadruplicate (adj.)

"fourfold, four times repeated," 1650s, from Latin quadruplicatus, past participle of quadruplicare "make fourfold," from quadri- "four" (from PIE root *kwetwer- "four") + plicare "to fold" (from PIE root *plek- "to plait").

quadruplicate (v.)

"to make fourfold, double twice," 1660s, from Latin quadruplicatus, past participle of quadruplicare "make fourfold," from quadri- "four" (from PIE root *kwetwer- "four") + plicare "to fold" (see ply (v.1)).  The sense of "make or provide in four identical versions" is by 1879. Related: Quadruplicated; quadruplicating.

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Definitions of quadruplicate from WordNet
1
quadruplicate (v.)
reproduce fourfold;
quadruplicate the bill
2
quadruplicate (n.)
any four copies; any of four things that correspond to one another exactly;
it was signed in quadruplicate
3
quadruplicate (adj.)
having four units or components;
Synonyms: quadruple / quadruplex / fourfold / four-fold
From wordnet.princeton.edu