oleum

noun
ole·​um | \ˈō-lē-əm \

Definition of oleum 

1 plural olea\ ˈō-​lē-​ə \ : 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

The first known use of oleum was circa 1823

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More Definitions for oleum

oleum

noun
ole·​um | \ˈō-lē-əm \
plural olea\ -​lē-​ə \

Medical Definition of oleum 

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