METAZOAN
metazoan
(noun) any animal of the subkingdom Metazoa; all animals except protozoans and sponges
Source: WordNet® 3.1
Etymology
Noun
metazoan (plural metazoans)
(zoology) Any animal that undergoes development from an embryo stage with three tissue layers, namely the ectoderm, mesoderm, and endoderm.
(zoology) Any animal that is multicellular.
Adjective
metazoan (not comparable)
Having to do with animals that develop from an embryo with three tissue layers.
Having to do with animals that are multicellular.
Synonyms
• metazoic
Source: Wiktionary
Met`a*zo"an, n.; pl. Metazoans (. (Zoöl.)
Definition: One of the Metazoa.
Source: Webster’s Unabridged Dictionary 1913 Edition