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quadragenarian
Quadragesima
quadragesimal
quadrangle
quadrant
quadraphonic
quadraplex
quadrat
quadrate
quadratic
quadratic equation
quadratics
quadrature
quadrennia
quadrennial
quadrennium
quadri-
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quadruple

quad·ru·ple [ kwo drp'l ]


transitive and intransitive verb  (past and past participle quad·ru·pled, present participle quad·ru·pling, 3rd person present singular quad·ru·ples)
Definition:
 
increase fourfold: to multiply something by four, or become four times as great



adjective 
Definition:
 
1. multiplied by four: four times as great

2. with four parts: made up of four parts

3. music with four beats per measure: describes a time or meter consisting of four beats to a measure



noun  (plural quad·ru·ples)
Definition:
 
quantity four times as great: a number or amount that is four times as great as another

[14th century. Via French< Latin quadruplus "fourfold" < quadri- "four"]

quad·ru·ply adverb
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