Definitionen
1.NounAny animal that is multicellular.
2.NounAny animal that undergoes development from an embryo stage with two or three tissue layers, namely the ectoderm, endoderm, and sometimes mesoderm.
3.AdjectiveHaving to do with animals that are multicellular.
4.AdjectiveHaving to do with animals that develop from an embryo with three tissue layers.