n :  any of the animals that comprise the taxon Metazoa, that have the body when adult composed of numerous cells differentiated into tissues and organs and usu. a digestive cavity lined with specialized cells, and that usu. include the coelenterates and all higher animals but sometimes also include the sponges and mesozoans metazoan adj 
 
 
 
Similar sounding terms:  med·i·cine 
 
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