noun
also thioindigoid
: any of a class of vat dyes characterized by the same chromophore as indigo (sense 1b) but with sulfur instead of an imino group as an auxochrome — compare indigoid dye
noun
also thioindigoid
: any of a class of vat dyes characterized by the same chromophore as indigo (sense 1b) but with sulfur instead of an imino group as an auxochrome — compare indigoid dye
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012