• synonyms


[rez-i-doo, -dyoo]
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  1. something that remains after a part is removed, disposed of, or used; remainder; rest; remnant.
  2. Chemistry.
    1. residuum(def 2).
    2. an atom or group of atoms considered as a group or part of a molecule.
    3. that part remaining as a solid on a filter paper after a liquid passes through in the filtration procedure.
  3. Law. the part of a testator's estate that remains after the payment of all debts, charges, special devises, and bequests.
  4. Mathematics.
    1. the coefficient of the term with exponent −1 in a Laurent series of a function of a complex variable.
    2. a number related to a given number by a congruence.
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Origin of residue

1300–50; Middle English < Middle French residu < Latin residuum what is left over; see residual
Can be confusedresidual residue


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1. remains, residuum. See remainder.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

slag, debris, silt, scum, surplus, garbage, extra, rest, remnant, remains, dross, trash, junk, leavings, residual, excess, remainder, sewage, dregs, balance

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British Dictionary definitions for residue


  1. matter remaining after something has been removed
  2. law what is left of an estate after the discharge of debts and distribution of specific gifts
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Word Origin

C14: from Old French residu, from Latin residuus remaining over, from residēre to stay behind, reside
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 residue


mid-14c., from Old French residu (14c.), from Latin residuum "a remainder, that which is left behind," noun use of neuter of adjective residuus "remaining, left over," from residere "remain behind" (see reside).

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Online Etymology Dictionary, © 2010 Douglas Harper

residue in Medicine


  1. The remainder of something after removal of parts or a part.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.