aqua fortis

Origin

aqua fortis

noun Chemistry.

Origin:
1595–1605; < Latin: literally, strong water
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Aqua fortis is always a great word to know.
So is ammonia. Does it mean:
a colorless, pungent, suffocating, highly water-soluble, gaseous compound, NH3, usually produced by the combination of nitrogen and hydrogen gases
selecting for combination or action; tending to combine with certain substances in preference to others, such as elective attraction
Collins
World English Dictionary
aqua fortis (ˈfɔːtɪs)
 
n
an obsolete name for nitric acid
 
[C17: from Latin, literally: strong water]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

aqua fortis
old name for "nitric acid," c.1600, from L., lit. "strong water;" see aqua- + (see fort).
Online Etymology Dictionary, © 2010 Douglas Harper
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