Quadruplicate

[kwɒ'druːplɪkət] or [kwɑ'drʊplɪket]

(noun.) any four copies; any of four things that correspond to one another exactly; 'it was signed in quadruplicate'.

(verb.) reproduce fourfold; 'quadruplicate the bill'.

Typed by Agatha--From WordNet

(v. t.) To make fourfold; to double twice; to quadruple.

(a.) Fourfold; doubled twice; four times repeated; as, a quadruplicate ratio, or a quadruplicate proportion.

(a.) Raised to the fourth power.

Editor: Woodrow