allantois
noun
al·lan·to·is ə-ˈlan-tə-wəs 
plural allantoides ˌa-lən-ˈtō-ə-ˌdēz
ˌa-ˌlan-
: a vascular fetal membrane of reptiles, birds, and mammals that is formed as a pouch from the hindgut and that in placental mammals is intimately associated with the chorion in formation of the placenta
allantoic
ˌa-lən-ˈtō-ik
adjective ˌa-ˌlan-
Word History
Etymology
New Latin, ultimately from Greek allant-, allas sausage
First Known Use
1615, in the meaning defined above
Medical Definition
allantois
noun
al·lan·to·is ə-ˈlant-ə-wəs
plural allantoides ˌal-ən-ˈtō-ə-ˌdēz ˌal-ˌan-
ˌal-ˌan- : a vascular fetal membrane of reptiles, birds, or mammals that is formed as a pouch from the hindgut and that in placental mammals is intimately associated with the chorion in formation of the placenta
- European fruit scale
- European gooseberry
- European grape
- European honeysuckle
- European hornet
- european hornets
- European house borer
- European larch
- European mountain ash
- European nightjar
- european oyster
- European partridge
- European pasqueflower
- European pine shoot moth
- European plan
- European plum
- European pond tortoise
- messtin
- messuage
- messuages
- messy
- messys
- messíni
- mest
- Mesta