[kwo-druhp-lit, -droo-plit, kwod-roo-plit]


any group or combination of four.
quadruplets, four children or offspring born of one pregnancy.
one of four such children or offspring.
Music. a group of four notes of equal value performed in the time normally taken for three.

Origin of quadruplet

1780–90; quadruple + -et (modeled on triplet)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for quadruplet

Historical Examples of quadruplet

  • But if, quite satisfied with your service, I propose to you five quadruplet instead of four, you would accept it without doubt.

British Dictionary definitions for quadruplet



one of four offspring born at one birthOften shortened to: quad
a group or set of four similar things
music a group of four notes to be played in a time value of three
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

Word Origin and History for quadruplet

"one of four children at a single birth," 1787; from quadruple (adj.) with ending from triplet. Related: Quadruplets. Musical sense is from 1873.

Online Etymology Dictionary, © 2010 Douglas Harper

quadruplet in Medicine


[kwŏ-drōōplĭt, -drŭplĭt, kwŏdrə-plĭt]


One of four offspring born in a single birth.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.