As an adjective extraembryonic

is (medicine) inside the womb, but outside the embryo.

As a noun chorioallantois is

(anatomy) the vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane.

As nouns the difference between membrane and chorioallantois

is that membrane is membrane while chorioallantois is (anatomy) the vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane.

In anatomy|lang=en terms the difference between allantois and chorioallantois

is that allantois is (anatomy) a sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles while chorioallantois is (anatomy) the vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane.

As nouns the difference between allantois and chorioallantois

is that allantois is (anatomy) a sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles while chorioallantois is (anatomy) the vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane.

As nouns the difference between chorion and chorioallantois

is that chorion is (anatomy|biology) the protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus while chorioallantois is (anatomy) the vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane.

In anatomy|lang=en terms the difference between placenta and chorioallantois

is that placenta is (anatomy) a vascular organ in mammals, except monotremes and marsupials, present only in the female during gestation it supplies food and oxygen from the mother to the foetus, and passes back waste it is implanted in the wall of the uterus and links to the foetus through the umbilical cord it is expelled after birth while chorioallantois is (anatomy) the vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane.

As nouns the difference between placenta and chorioallantois

is that placenta is (anatomy) a vascular organ in mammals, except monotremes and marsupials, present only in the female during gestation it supplies food and oxygen from the mother to the foetus, and passes back waste it is implanted in the wall of the uterus and links to the foetus through the umbilical cord it is expelled after birth while chorioallantois is (anatomy) the vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane.

As nouns the difference between mammal and chorioallantois

is that mammal is an animal of the class mammalia, characterized by being warm-blooded, having hair and feeding milk to its young while chorioallantois is (anatomy) the vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane.

As nouns the difference between heparin and midkine

is that heparin is (medicine|carbohydrate) a glycosaminoglycan, originally isolated from liver cells, now made synthetically for medical use, used as an anticoagulant while midkine is a basic heparin-binding growth factor of low molecular weight.

Mk is a synonym of midkine.

As an abbreviation mk

is (a particular make or model).

As a noun midkine is

a basic heparin-binding growth factor of low molecular weight.

Mdk is a synonym of midkine.

As a noun midkine is

a basic heparin-binding growth factor of low molecular weight.

As verbs the difference between founded and cofounded

is that founded is while cofounded is (cofound).

As adjectives the difference between founded and cofounded

is that founded is having a basis while cofounded is founded at the same time as another, or by two or more people.