oleum

[oh-lee-uhm]

o·le·um

[oh-lee-uhm]
noun, plural o·le·a [oh-lee-uh] for 1, o·le·ums for 2.
1.
Pharmacology. oil.
2.
Chemistry. pyrosulfuric acid.

Origin:
1900–05; < Latin: oil
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Oleum is always a great word to know.
So is interrobang. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
Collins
World English Dictionary
oleum (ˈəʊlɪəm)
 
n , pl olea, oleums
another name for fuming sulphuric acid
 
[from Latin: oil, referring to its oily consistency]

Collins English Dictionary - Complete & Unabridged 10th Edition
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