A.R.

A form of aqua regia — A mixture of three parts concentrated hydrochloric acid to one part concentrated nitric acid, named for its ability to dissolve gold.

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Meanings

nounA.R. (uncountable)
  1. abbreviationinitialismuncountablealchemyInitialism of aqua regia.
Cite this entry
APA

A.R.. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/A.R.

MLA

“A.R..” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/A.R.. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “A.R.,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/A.R..

Source: A.R. on Wiktionary, CC BY-SA 4.0.