diploblastic

adjective

1. having two germ layers, the ectoderm and endoderm, as the embryos of sponges and coelenterates.

adjective

1. (of jellyfish, corals, and other coelenterates) having a body developed from only two germ layers (ectoderm and endoderm)Compare triploblastic

adj.

1. Derived from two embryonic germ layers, the ectoderm and the endoderm. Used of invertebrates such as sponges and coelenterates.