1. a marine worm of the class Polychaeta, characterized by numerous bristle-like structures (setae) on each body segment
Usage: biology; also spelled polychete

Examples

• Polychaetes are found in oceans around the world, from shallow tide pools to the deep sea.
• The researcher studied polychaete worms to understand how they adapt to different marine environments.
• Many polychaetes have colorful tentacles that they use to filter food from the water.
• Polychaetes play an important role in marine ecosystems as food for fish and other animals.
• The bristles on a polychaete's body help it move through sand and mud on the ocean floor.