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Definition

noun

A blastula (or an ovum) with two primary germ layers: ectoderm and endoderm.

Supplement

Examples of animals that developed from a diploblastic embryo are cnidarians and ctenophores.

Word origin: Greek diplóos, twofold + blastikós, budding.

Related forms: diploblastic (adjective).

Compare: triploblasty.
See also: blastula, germ layer.