Protostomia

Etymology
from + , referring to a theory about the order of embryonic development.

Proper noun

 * 1) Certain bilateral animals, generally with three germ cells and common features of embryonic development.

Hypernyms

 * Eukaryota - superkingdom; Animalia - kingdom; Bilateria - subkingdom

Hyponyms

 * Ecdysozoa, - superphyla
 * Ecdysozoa, - superphyla

Coordinate terms

 * Deuterostomia