1. a multicellular animal organism, as distinguished from a protozoon
Usage: biology; technical

Examples

• The metazoon exhibits complex tissue organization unlike single-celled organisms.
• Scientists study the evolutionary transition from protozoans to metazoans.
• Each metazoon contains specialized cells that perform different functions.
• The development of a metazoon involves cell differentiation and tissue formation.
• Marine biologists collected various metazoan specimens from the ocean floor.