What is "amniotic fluid"

n. (context zoology English): In placental mammals, a fluid contained within the amnion membrane that surrounds a developing embryo or fetus.

n. the serous fluid in which the embryo is suspended inside the amnion; "before a woman gives birth her waters break" [syn: amnionic fluid, waters]

The amniotic fluid, commonly called a pregnant woman's water or waters (Latin liquor amnii), is the protective liquid contained by the amniotic sac of a pregnant female.