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

Words nearby oleum

oleoresinous, oleo strut, olericulture, olestra, olethreutid, oleum, O level, oleyl alcohol, olfaction, olfactometer, olfactometry

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use oleum in a sentence

Greek-fire was the precursor of gunpowder; it was the oleum incendiarum of the Romans.
The Browning Cyclopdia|Edward Berdoe
Iterumque, Quinti Julii Murranii stagium opobalsamatum, sive myrrhæ oleum opobalsamo permixtum, ad cap.
Archaeological Essays Vol. 2|James Y. Simpson
A sample of B. Oleum Iodine was submitted by the manufacturer and examined.
The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2|Various
A few crystals of ammonium chlorid were added to a little of B. Oleum Iodine and treated as above.
The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2|Various

From the Latin oleum, formed from olea, olive-tree, the fruit of which abounds in oil.
A Catechism of Familiar Things; Their History, and the Events Which Led to Their Discovery|Benziger Brothers

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