Having or characterized by the property of an auxochrome; capable of intensifying color or light absorption in a molecule.
From 'auxochrome' with the Greek suffix '-ous' (having the quality of). This adjectival form allowed chemists to describe materials and molecules with color-intensifying properties.
When chemists say something is 'auxochromous,' they're describing atoms or groups that are professional color-enhancers—they don't create color themselves but make existing colors pop like turning up the brightness dial.
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