Meaning of NITRO- in English

a combining form or an adjective denoting the presence of niter.

2. nitro- ·- 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 English vocab.      Английский словарь Webster.