Date: circa 1881
: the double-walled fluid-filled sac that encloses and protects the fetus in the womb and that breaks releasing its fluid during the birth process
Date: circa 1881
: the double-walled fluid-filled sac that encloses and protects the fetus in the womb and that breaks releasing its fluid during the birth process
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003