metazoan Definition
any animal of the subkingdom Metazoa, comprising all multicellular animals except the protozoans..
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Summary: metazoan in Brief
'Metazoan' [met-uh-zoh-uhn] refers to any multicellular animal belonging to the subkingdom Metazoa, which excludes protozoans. It is a formal term used in biology to describe the vast majority of animals on earth.