1. a blue or blue-green pigment or dye, especially one derived from plants or used in photography and printing
Usage: chemistry; technical
2. any of various blue anthocyanin pigments found in flowers and fruits
Usage: botany; biochemistry

Examples

• The cyanin in the blueberries gives them their distinctive deep blue color.
• Photographers use cyanin-based dyes in certain color processes.
• The petals of the morning glory contain cyanin pigments.
• Cyanin compounds are studied for their antioxidant properties.
• The textile industry employs synthetic cyanin dyes for fabric coloring.