- containing nitrogen, usually in the pentavalent state.
- of or relating to niter.
- of or containing nitrogen, esp in the pentavalent state
adj.1794, originally in reference to acid obtained initially from distillation of saltpeter; see nitre + -ic. Perhaps immediately from French nitrique. Known as aqua fortis, later acid spirit of nitre, then nitric acid. (1787) under the system ordered by Lavoisier.
- Containing nitrogen, especially nitrogen with a valence of 5. Compare nitrous.