A salt of nitrous acid.
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ni·trite 'nī-.trīt n a salt or ester of nitrous acid
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ni·trite (niґtrīt) any salt or ester of nitrous acid or the NO2− anion; organic nitrites, e.g., amyl nitrite, have been used as coronary vasodilators in the treatment of angina pectoris.Medical dictionary. 2011.