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allantois

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allantois


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Allantois  \Al*lan"to*is\,  Allantoid  \Al*lan"toid\,  ]  n..  (Anat.) 
  A  membranous  appendage  of  the  embryos  of  mammals,  birds,  and 
  reptiles,  --  in  mammals  serving  to  connect  the  fetus  with  the 
  parent;  the  urinary  vesicle. 
 
  From  WordNet  r  1.6  [wn]: 
 
  allantois 
  n  :  vascular  fetal  membrane  that  develops  from  the  hindgut  in 
  embryonic  higher  vertebrates  (mammals;  birds;  reptiles) 




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