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gastrulae

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gastrulae


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  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. 




more about gastrulae