The free radical N—O·; (also) any of a class of relatively stable free radicals containing this group, RR′N—O·, which are used especially as spin-labels in electron spin resonance.
Origin
Early 19th century (in an earlier sense). From nitro- + oxide.
Definition of nitroxide in US English:
nitroxide
nounnʌɪˈtrɒksʌɪd
Chemistry
The free radical N—O·; (also) any of a class of relatively stable free radicals containing this group, RR′N—O·, which are used especially as spin-labels in electron spin resonance.
Origin
Early 19th century (in an earlier sense). From nitro- + oxide.