A part of an animal which is capable of reproducing it, or developing into a new individual of the same kind; spec. (a) an embryo in its initial…

An embryo during the stage of development following the gastrula, when the neural plate and neural tube develop.

Also parenchymula larva. A parenchymella.

A sponge larva having no internal cavity.

The stage in the development of an embryo when the characteristic structure of its phylum or subkingdom begins to appear.

A metazoan embryo at a stage at which it exhibits the characters of the phylum or other principal taxonomic group to which it belongs; (apparently) =…