- 1. 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. Source: opted
- 2. 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. Source: webster
- 3. Those animals in which the protoplasmic mass, constituting theegg, is converted into a multitude of cells, which are metamorphosedinto the tissues of the body. A central cavity is commonly developed,and the cells around it are at first arranged in two layers, -- theectoderm and endoderm. The group comprises nearly all animals exceptthe Protozoa. Source: adambom
- 4. n multicellular animals having cells differentiated into tissues and organs and usually a digestive cavity and nervous system n any animal of the subkingdom Metazoa; all animals except protozoans and sponges Source: ecdict
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