[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.

Origin of residuum

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

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Historical Examples of residuum

British Dictionary definitions for residuum


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

residuum in Medicine


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