a. [ Pref. hypo- + nitrous. ] (Chem.) Containing or derived from nitrogen having a lower valence than in nitrous compounds. [ 1913 Webster ]
Hyponitrous acid (Chem.), 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. [ 1913 Webster ]
a. [ L. nitrosus full of natron: cf. F. nitreux. See Niter. ] 1. Of, pertaining to, or containing, niter; of the quality of niter, or resembling it. [ 1913 Webster ]
2. (Chem.) Of, pertaining to, or designating, any one of those compounds in which nitrogen has a relatively lower valence as contrasted with nitric compounds. [ 1913 Webster ]
Nitrous acid (Chem.), a hypothetical acid of nitrogen HNO2, not known in the free state, but forming a well known series of salts, viz., the nitrites. -- Nitrous oxide. See Laughing gas. [ 1913 Webster ]
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เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
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