1. a tuft or clump of wool, cotton, or similar fibrous material; a lock of hair or fiber.
2. a fluffy or woolly mass formed by the aggregation of fine particles, especially in water treatment or chemistry.
Usage: technical; chemistry

Examples

• The sheep's wool was matted into thick flocs.
• A floc of dust settled on the windowsill.
• The water treatment plant uses chemicals to form flocs that trap impurities.
• Flocs of cotton fiber were visible in the textile mill.
• The microscope revealed tiny flocs suspended in the solution.