Gastrulae

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  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)]

From WordNet (r) 2.0 [wn]:

  gastrulae
       See {gastrula}