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gastrula

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gastrula


  4  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  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}. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Planula  \Plan"u*la\,  n.;  pl  {Planul[ae]}.  [L.,  a  little  plane.] 
  1.  (Biol.)  In  embryonic  development,  a  vesicle  filled  with 
  fluid,  formed  from  the  morula  by  the  divergence  of  its 
  cells  in  such  a  manner  as  to  give  rise  to  a  central  space, 
  around  which  the  cells  arrange  themselves  as  an  envelope; 
  an  embryonic  form  intermediate  between  the  morula  and 
  gastrula.  Sometimes  used  as  synonymous  with  {gastrula}. 
 
  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. 
 
  From  WordNet  r  1.6  [wn]: 
 
  gastrula 
  n  :  double-walled  stage  of  the  embryo  succeeding  the  blastula 




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