METAZOA

Metazoa, subkingdom Metazoa

(noun) multicellular animals having cells differentiated into tissues and organs and usually a digestive cavity and nervous system

METAZOAN

metazoan

(noun) any animal of the subkingdom Metazoa; all animals except protozoans and sponges

Source: WordNet® 3.1

Noun

metazoa pl (plural only)

(zoology) The multicellular animals of the subkingdom Metazoa considered collectively.

Source: Wiktionary

Met`a*zo"a, n. pl. Etym: [NL., fr. Gr. (Zoöl.)

Definition: 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.

METAZOON

Met`a*zo"ön, n. Etym: [NL.] (Zoöl.)

Definition: One of the Metazoa.

Source: Webster’s Unabridged Dictionary 1913 Edition

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