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n. pl. o·le·a (ō′lē-ə) or o·le·ums
A corrosive fuming solution of sulfur trioxide in sulfuric acid.

[Latin, olive oil; see oil.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl olea (ˈəʊlɪə) or oleums
(Elements & Compounds) another name for fuming sulphuric acid
[from Latin: oil, referring to its oily consistency]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Biysk Oleum Plant in Russia's Altai region will begin delivery of octane-increasing additives in Azerbaijan, Executive Director of the plant Viktor Golovin said on May 25commenting on the results of his visit to Azerbaijan.
For the concentration determination, sonic velocity meters have proven to be ideal, as sonic velocity forms a strong and unambiguous function to the concentration of sulfuric acid and oleum in the production-relevant concentration ranges.
Though India generally followed the English law of torts based on common law principles, the Supreme Court in the landmark Oleum gas leak case in 1987 rejected the " strict liability'' principle developed in England and developed its own principle of " absolute liability'' to fix liability for accidents in hazardous industries without any exceptions or exemptions.