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quadruple

[kwo-droo-puh l, -druhp-uh l, kwod-roo-puh l] /kwɒˈdru pəl, -ˈdrʌp əl, ˈkwɒd rʊ pəl/
adjective
1.
fourfold; consisting of four parts:
a quadruple alliance.
2.
four times as great.
3.
Music. having four beats to a measure.
noun
4.
a number, amount, etc., four times as great as another.
5.
something, as a series of acrobatic somersaults, made up of four clearly defined parts or stages:
the first trapeze artist to perform a quadruple successfully.
verb (used with object), verb (used without object), quadrupled, quadrupling.
6.
to make or become four times as great:
To serve 24 people, quadruple the recipe. My savings quadrupled in 20 years.
Origin
1325-1375
1325-75; Middle English < Latin quadruplus; cf. quadru-, duple
Related forms
quadrupleness, noun
quadruply, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for quadruply

quadruple

/ˈkwɒdrʊpəl; kwɒˈdruːpəl/
verb
1.
to multiply by four or increase fourfold
adjective
2.
four times as much or as many; fourfold
3.
consisting of four parts
noun
4.
a quantity or number four times as great as another
Derived Forms
quadruply, adverb
Word Origin
C16: via Old French from Latin quadruplus, from quadru- (see quadri-) + -plus -fold
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for quadruply

quadruple

v.

late 14c., from Middle French quadrupler, from Late Latin quadruplare "make fourfold, multiply by four," from Latin quadruplus (adj.) "quadruple, fourfold" (see quadruple (adj.)).

adj.

1550s, from Middle French quadruple (13c.), from Latin quadruplus "fourfold," from quadri- "four" (see quadru-) + -plus "more" (see plus).

Online Etymology Dictionary, © 2010 Douglas Harper
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