Thesaurus: metazoa

Related headwords

Definitions

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.
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.
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.
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