Nitro-

[Sarah]

A combining form (used also adjectively) designating certaincompounds of nitrogen or of its acids, as nitrohydrochloric,nitrocalcite; also, designating the group or radical NO2, or itscompounds, as nitrobenzene. Nitro group, the radical NO2; -- calledalso nitroxyl.

[Luxx 6969]

good combination