chlorousadj.
/ˈklɔːrəs/ Chemistry.
1. Abounding in chlorine; spec. containing chlorine in greater proportion relatively to oxygen than chloric compounds, as in chlorous oxide n. or chlorous anhydride n. Cl2O3, a yellowish green gas. chlorous acid n. (hydrogen chlorite) H Cl O2, the salts of which are chlorites.The compounds with a still greater proportion of chlorine are hypochlorous oxide n. (hypochlorous anhydride) (Cl2O) a pale reddish yellow gas; and hypochlorous acid n. (H Cl O) the salts of which are hypochlorites.
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chlorous1845
1845 G. E. Day tr. J. F. Simon Animal Chem. I. 41 Replaced by six atoms of chlorous acid.
1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 196 Chlorous Oxide.
1873 H. Watts Fownes's Man. Elem. Chem. (ed. 11) 184 Hypochlorous and chlorous acids..by direct oxidation of hydrochloric acid.
2. Of the quality of chlorine: applied to elements or radicals which unite with hydrogen to form an acid, and are relatively electro-negative. chlorous pole, the negative pole of a galvanic battery, which exhibits the same attraction as a chlorous element.
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1881 A. W. Williamson in Nature 1 Sept. 414/2 Such primary compounds were classified..into electro-positive or basylous, and electro-negative or chlorous compounds.
1881 A. W. Williamson in Nature 1 Sept. 417 Illustrations of the greater atomic values which elements assume by combining with both chlorous and basylous atoms than with atoms of the one kind only.
This entry has not yet been fully updated (first published 1889; most recently modified version published online December 2019).
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adj.1845