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oleum

[ oh-lee-uhm ]
/ ˈoʊ li əm /
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noun, plural o·le·a [oh-lee-uh] /ˈoʊ li ə/ for 1, o·le·ums for 2.
Pharmacology. oil.
Chemistry. pyrosulfuric acid.
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Origin of oleum

1900–05; <Latin: oil
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use oleum in a sentence

British Dictionary definitions for oleum

oleum
/ (ˈəʊlɪəm) /

noun plural olea (ˈəʊlɪə) or oleums
another name for fuming sulphuric acid

Word Origin for oleum

from Latin: oil, referring to its oily consistency
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
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