Any four copies

• Any of four things that correspond to one another exactly
• Greatly increase output of ducal art and equip &hellip

WordNet Word definitions in WordNet
adj. having four units or components; "quadruple rhythm has four beats per measure"; "quadruplex wire" [syn: quadruple , quadruplex , fourfold ] n. any four copies; any of four things that correspond to one another exactly; "it was signed in quadruplicate" ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1650s, from Latin quadruplicatus , past participle of quadruplicare "make fourfold," from quadri- "four" (see quadri- ) + plicare "to fold" (see ply (v.1)).

Wiktionary Word definitions in Wiktionary
having four parts n. '''in quadruplicate''': four times over, in four copies v To replicate four times; to make fourfold; to quadruple.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Quadruplicate \Quad*ru"pli*cate\, v. t. [imp. & p. p. Quadruplicated ; p. pr. & vb. n. Quadruplicating .] [L. quadruplicatus, p. p. of quadruplicare, fr. quadruple? fourfold. See Quadruplex .] To make fourfold; to double twice; to quadruple.