NCBI taxonomy browser, Jan. 6, 2017 (Metazoa (metazoans). Rank: kingdom. Synonym: Animalia. Common name: multicellular animals. Blast name: animals)

Merriam-Webster dictionary online, Jan. 6, 2017 (metazoan: any of a group (Metazoa) that comprises all animals having the body composed of cells differentiated into tissues and organs and usually a digestive cavity lined with specialized cells)

Dictionary.com unabridged, Jan. 6, 2017 (Metazoa: a zoological group comprising the multicellular animals)

Oxford English dictionary online, Jan. 6, 2017 (Metazoa: A major division of the animal kingdom that comprises all animals other than protozoans and sponges. They are multicellular animals with differentiated tissues)

ITIS, Jan. 6, 2017