Term: Eumetazoans (misspelling of Eumetazoa)
Literally meaning: “well defined after animals”
μετά/meta(after, next to)
ζώα/zoa(=plural of “ζώον”/zoon=a live thing, animal)
The term was coined in accordance with the term "Protozoa", precursors of Metazoa
(zoology): Eumetazoans is the clade, or subkingdom of all multicellular animals which are characterised by having cells differentiated into tissues and organs and an embryo that goes through a gastula stage. All animals except for sponges and placozoa (marine invertebrates) are classified as Eumetazoans. Although the term "Eumetazoans" is most frequently used for this group of organisms, in general the term "Metazoans" is used to describe the kingdom of Animalia as a whole.