noun
- a zoological group comprising the multicellular animals.
noun
- any multicellular animal of the group Metazoa : includes all animals except sponges
adjective Also: metazoic
- of, relating to, or belonging to the Metazoa
n.
- A subdivision of the animal kingdom that includes all multicellular animal organisms having cells that are differentiated and form tissues and organs.
- Any of the animals belonging to the subkingdom Metazoa, having a body made up of differentiated cells arranged in tissues and organs. All multicellular animals besides sponges are metazoans.
- A multicellular animal. No longer in scientific use.