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auxochromic
auxochromic adj. 
/ˌɔːksəʊˈkrəʊmɪk/ defining such groups.
/ˌɔːksəʊˈkrəʊmɪk/ defining such groups.ΘΚΠ
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auxochromic1892
auxochromous1902
1892 A. Collin & W. Richardson tr. Nietzki Chem. Org. Dyestuffs i. 13 The chromophoric quinone group confers strong acid properties on the auxochromic hydroxyl group.
1902 Brit. Jrnl. Photogr. 11 Apr. 299 Auxochromic groups.
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