nitro- Meaning, Definition & Usage

Ni"tro-
Definitions
  1. A combining form or an adjective denoting the presence of niter.
  2. (Chem.) A combining form (used also adjectively) designating certain compounds of nitrogen or of its acids, as nitrohydrochloric, nitrocalcite; also, designating the group or radical NO2, or its compounds, as nitrobenzene.

Webster 1913