metazoan

meta·zo·an

noun \-ˈzō-ən\

Definition of METAZOAN

: 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 usually a digestive cavity lined with specialized cells, and that usually include the coelenterates and all higher animals but sometimes also include the sponges and mesozoans

—metazoan adjective