oleum

noun
ole·​um | \ ˈō-lē-əm How to pronounce oleum (audio) \

Definition of oleum

1 plural olea\ ˈō-​lē-​ə How to pronounce oleum (audio) \ : oil
2 plural oleums : a heavy oily strongly corrosive solution of sulfur trioxide in anhydrous sulfuric acid

First Known Use of oleum

circa 1823, in the meaning defined at sense 1

History and Etymology for oleum

Latin, olive oil — more at oil

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Time Traveler for oleum

Time Traveler

The first known use of oleum was circa 1823

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Cite this Entry

“Oleum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oleum. Accessed 21 Jun. 2021.

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More Definitions for oleum

oleum

noun
ole·​um | \ ˈō-lē-əm How to pronounce oleum (audio) \
plural olea\ -​lē-​ə How to pronounce oleum (audio) \

Medical Definition of oleum

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