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.)
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)). Related: Quadruplicated; quadruplicating.
quadruplicate the bill
it was signed in quadruplicate
quadru-
quadruped
quadruple
quadruplet
quadruplex
quadruplicate
quadruplication
quaere
quaff
quag
quagga