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[Subject: Biology]
- the membrane that surrounds a fetus in the womb, especialy a part of this that sometimes covers its head when it is born
Translated by: DAVID LAURENT
Translated in 8 languages
[Subject: Generalities]
Translated by: FARHAD PEZESHKI
Translated in 4 languages
Translated by: GUEST USER
Translated in 2 languages