1. plural of indulin; synthetic blue or green dyes used in textile manufacturing
Usage: technical; chemistry

Examples

• The textile factory used indulins to achieve vibrant blue colors in their fabrics.
• Indulins were among the first synthetic dyes developed in the 19th century.
• The chemist studied the molecular structure of various indulins.
• These indulins produce excellent colorfastness in cotton materials.
• Industrial production of indulins revolutionized the dyeing industry.