Found 2 items, similar to Gastrula.
English → English (WordNet) Definition: gastrula gastrula n : double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm [also: gastrulae (pl)]
English → English (gcide) Definition: Gastrula Gastrula \Gas"tru*la\, n.; pl. Gastrul[ae][NL., dim. fr. Gr. ? the stomach.] (Biol.) An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastr[ae]a. -- a. Of or pertaining to a gastrula. [1913 Webster] Stomapoda \Sto*map"o*da\, n. pl. [NL. See Stoma, and -poda.] (Zo["o]l.) An order of Crustacea including the squillas. The maxillipeds are leglike in form, and the large claws are comblike. They have a large and elongated abdomen, which contains a part of the stomach and heart; the abdominal appendages are large, and bear the gills. Called also Gastrula, Stomatopoda, and Squilloidea. [1913 Webster]