Metazoa (redirected from Metazoans)

Met`a`zo´a

n. pl.

1.

(Zool.) Those animals in which the protoplasmic mass, constituting the egg, is converted into a multitude of cells, which are metamorphosed into the tissues of the body. A central cavity is commonly developed, and the cells around it are at first arranged in two layers, - the ectoderm and endoderm. The group comprises nearly all animals except the Protozoa.

Thesaurus

Noun

1.

Metazoa - multicellular animals having cells differentiated into tissues and organs and usually a digestive cavity and nervous system subkingdom Metazoa animal kingdom, Animalia, kingdom Animalia - taxonomic kingdom comprising all living or extinct animals metazoan - any animal of the subkingdom Metazoa; all animals except protozoans and sponges Cnidaria, Coelenterata, phylum Cnidaria, phylum Coelenterata - hydras; polyps; jellyfishes; sea anemones; corals subkingdom - (biology) a taxonomic group comprising a major division of a kingdom