01 a. Containing or derived from nitrogen having a lower valence than in nitrous compounds.
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1.
Containing or derived from nitrogen having a lower valence than in nitrous compounds.(Chem.)
Phrases & compounds
Hyponitrous acid —
an unstable nitrogen acid, NOH, whose salts are produced by reduction of the nitrates, although the acid itself is not isolated in the free state except as a solution in water; -- called also nitrosylic acid.