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[ri-zij-oo-uh m]
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noun, plural re·sid·u·a [ri-zij-oo-uh] /rɪˈzɪdʒ u ə/.
  1. the residue, remainder, or rest of something.
  2. Also residue. Chemistry. a quantity or body of matter remaining after evaporation, combustion, distillation, etc.
  3. any residual product.
  4. Law. the residue of an estate.
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Origin of residuum

From Latin, dating back to 1665–75; see origin at residual
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for residua

Historical Examples

  • The residua of distillation remain almost entirely in the reservoir, O, from whence they are easily removed.

    Scientific American Supplement, No. 324, March 18, 1882


British Dictionary definitions for residua


noun plural -ua (-jʊə)
  1. a more formal word for residue
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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

residua in Medicine


n. pl. re•sid•u•a (-ōō-ə)
  1. Something remaining after removal of a part; a residue.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.