Definition: Aqua fortis is an old name for nitric acid (HNO3).
Also Known As: acid of nitre, acid of spirit, spirit of nitre
By Anne Marie Helmenstine, Ph.D., About.com Guide
Nitric acid also is called aqua fortis or spirit of nitre.
Ben Mills©2012 About.com. All rights reserved.
A part of The New York Times Company.