Gastrulation

2 definitions found

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

  Gastrulation \Gas`tru*la"tion\ (g[a^]s`tr[.u]*l[=a]"sh[u^]n), n.
     (Biol.)
     The process of invagination, in embryonic development, by
     which a gastrula is formed.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  gastrulation
       n : the process in which a gastrula develops from a blastula by
           the inward migration of cells