deuterostome

/doo-ter-uh-stohm, dyoo-/US // ˈdu tər əˌstoʊm, ˈdyu- //

蝶形动物,氘代动物,蝶形动物群,胎生动物

Definitions

n.名词 noun

1
- : Embryology. a mouth that develops separately from the blastopore.
- : Taxonomy. any member of the phyla in which the anus appears first, developing at or near the blastopore, cleavage is radial and indeterminate, and the mesoderm and coelom form from outgrowths of the primitive gut.