1. a tiny fragment of plastic, typically less than 5 millimeters in diameter, that results from the breakdown of larger plastic items or is manufactured at a small size for use in consumer products.
Usage: usually used in plural form; environmental and scientific term

Examples

• Microplastics have been found in ocean water and marine life around the world.
• Scientists are concerned about the accumulation of microplastics in drinking water.
• Microplastics from synthetic clothing can enter waterways during washing.
• The study examined how microplastics affect fish and other aquatic organisms.
• Microplastics are now detected in human blood and lung tissue.
• Many countries are working to reduce microplastic pollution from consumer products.