Metazoa :: Metazoa (n. pl.) 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..

Metazoan :: Metazoan (n.) One of the Metazoa.

Metazoans :: Metazoans (pl. ) of Metazoa.

Metazoic :: Metazoic (a.) Of or pertaining to the Metazoa.

Metazoon :: Metazoon (n.) One of the Metazoa.

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