What is the meaning of Aqua_fortis?

Nitric acid.

A corrosive liquor made of saltpeter, serving as a solvent for dissolving silver and all other metals except gold.

Any strong and potentially dangerous alcoholic drink.

aqua fortis

  1. a saltpeter-water solution
  2. nitric acid

a saltpeter-water solution

nitric acid

Source: wiktionary.org