noun, plural olea [oh-lee-uh] , for 1, oleums for 2.
Pharmacology, oil.
Chemistry, pyrosulfuric acid.

1900–05; < Latin: oil

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To oleum
World English Dictionary
oleum (ˈəʊlɪəm)
n , pl olea, oleums
another name for fuming sulphuric acid
[from Latin: oil, referring to its oily consistency]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Example sentences
Oleum is a concentrated solution of sulfuric acid and sulfur trioxide.
Over time, the oleum had corroded piping in the plant's spent acid recovery unit.
Exposure to sulfuric acid and oleum can also occur through accidental releases.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature