Word.ws English Dictionary

A.R.

A.R. is the initialism of aqua regia.

Meaning of aqua regia

Noun

aqua regia (uncountable, abbreviation A.R.)

  1. (archaic) A mixture of three parts concentrated hydrochloric acid to one part concentrated nitric acid, named for its ability to dissolve gold.
    • Consider another example. If gold is placed in aqua regia then it dissolves. Aqua regia is a mixture of nitric and hydrochloric acids that dissolves gold or platinum. Observation of gold dissolving in aqua regia (argument 1 1) lends credence to the above conditional statement.
    • Not placing the gold into aqua regia and gold not dissolving (argument 0 0) does not disprove the truth-value of this conditional.2005, D.J. Krus, Elements of Propositional Calculus

Questions about A.R.

What is A.R. the initialism of?
A.R. is the initialism of aqua regia.

Words near A.R. in the dictionary

  1. A.M.s
  2. A.N. Other
  3. a.o.
  4. a.o.b.
  5. A.O.C.
  6. A.R.
  7. A.R.E.
  8. a.s.
  9. A.S.I.
  10. A.S.L.E.F.
  11. a.u.

Source and license

Adapted from Wiktionary: A.R. (page history and authors); aqua regia (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “A.R..” Word.ws, https://word.ws/a.r.. Based on Wiktionary, CC BY-SA 4.0.