Roget's Thesaurus: Entry 96 (Quadruplication)

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#96. Quadruplication. -- N. quadruplication.

V. multiply by four, quadruplicate, biquadrate[obs].

Adj. fourfold, four times; quadrable[obs], quadrumanous[obs], quadruple, quadruplicate, quadrible[obs]; fourth.

quadrifoliate[obs], quadrifoliolate[obs], quadrigeminal[obs], quadrigeminate[obs], quadriplanar[obs], quadriserial[obs].

Adv. four times; in the fourth place, fourthly.