aqua fortis

aqua fortis

noun Chemistry.

Origin:
1595–1605; < Latin: literally, strong water

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aqua fortis (ˈfɔːtɪs)
 
n
an obsolete name for nitric acid
 
[C17: from Latin, literally: strong water]

Collins English Dictionary - Complete & Unabridged 10th Edition
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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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