[ ri-zij-oo-uh m ]
/ rɪˈzɪdʒ u əm /

noun, plural re·sid·u·a [ri-zij-oo-uh] /rɪˈzɪdʒ u ə/.

the residue, remainder, or rest of something.
Also residue. Chemistry. a quantity or body of matter remaining after evaporation, combustion, distillation, etc.
any residual product.
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. 2020

Examples from the Web for residuum

British Dictionary definitions for residuum

/ (rɪˈzɪdjʊəm) /

noun plural -ua (-jʊə)

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

Medical definitions for residuum

[ rĭ-zĭjōō-əm ]

n. pl. re•sid•u•a (-ōō-ə)

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.