Meaning of METAZOA
| Pronunciation: | | `metu'zowu
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 WordNet Dictionary |
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| | Definition: | | [n] multicellular animals having cells differentiated into tissues and organs and usually a digestive cavity and nervous system |
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| | Synonyms: | | subkingdom Metazoa |
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| | See Also: | | animal kingdom, Animalia, Cnidaria, Coelenterata, kingdom Animalia, metazoan, phylum Cnidaria, phylum Coelenterata, subkingdom | |
| Webster's 1913 Dictionary |
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| | Definition: | | \Met`a*zo"a\, n. pl. [NL., fr. Gr. ? after + ? an
animal.] (Zo["o]l.)
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.
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