Look up: allantois

1. 
   allantois
   [n] - vascular fetal membrane that develops from the hindgut in embryonic higher vertebrates (mammals
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. 
   allantois
   Outgrowth from the ventral side of the hindgut in embryos of reptiles, birds and mammals. Serves the embryo as a store for nitrogenous waste and in chick embryos fuses with the chorion to form the chorioallantoic membrane (CAM).
   Found on http://www.mblab.gla.ac.uk/dictionary/
   
   
3. 
   allantois
   An embryonic diverticulum of the hindgut of reptiles, birds, and mammals; in man its blood vessels give rise to those of the umbilical cord. ... (12 Dec 1998) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
4. 
   allantois
   noun vascular fetal membrane that develops from the hindgut in embryonic higher vertebrates (reptiles, birds and mammals)
   Found on http://wordnet.princeton.edu/perl/webwn?
   
   
5. 
   Allantois
   `Allantois` (plural `allantoides` or `allantoises`) is a part of a developing animal conceptus (which consists of all embryonic and extra-embryonic tissues). It helps the embryo exchange gases and handle liquid waste. The allontois, along with the amnion and chorion (other embryonic membranes), identify humans as amniotes, along with reptiles, dinosaurs, birds, and other mammals.
   Found on http://en.wikipedia.org/wiki/Allantois
   
   
6. 
   allantois
   (ә-lan´to-is) a small sausage-shaped outpouching from the caudal wall of the yolk sac of the early embryo, associated with early blood formation and development of the urinary bladder; its blood vessels become the umbilical arteries and veins. adj., allanto´ic., adj.
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
7. 
   Allantois
   • (n.) Alt. of Allantoid
   Found on http://thinkexist.com/dictionary/meaning
   
   
8. 
   allantois
   an extra-embryonic membrane of reptiles, birds, and mammals arising as a pouch, or sac, from the hindgut. In reptiles and birds it expands greatly ... [5 related articles]
   Found on http://www.britannica.com/eb/a-z/a/48
   
   
9. 
   allantois
   allantois 1. An elongated bladder developing from the hindgut of the fetus in mammals, birds, and reptiles. In mammals, it contributes to the development of the umbilicus and plancenta. In birds and reptiles, it provides for the exchange of gases through the shell. 2. A membranous sac in the embryos of mammals, birds, and reptiles. 3. The fetal membrane (so ...
   Found on http://www.wordinfo.info/words/index/inf
   
   
10. 
    allantois
    A fetal membrane developing from the hindgut (or yolk sac, in humans). In humans it is vestigial; externally, in mammals, it contributes to the formation of the umbilical cord and placenta; in birds and reptiles, it lies close beneath the porous shell and serves as an organ of respiration. Syn: allantoid membrane [allanto- + G. eidos, appearance]
    Found on http://www.stedmans.com/section.cfm/45