| 释义 |
amniotic sac
noun[ C ]
medical specializeduk /ˌæm.ni.ɒt.ɪk ˌsæk/ us /ˌæm.ni.ɑː.t̬ɪk ˌsæk/
a bag of liquid that surrounds the embryo of a mammal, bird, or reptile inside its mother: 羊膜囊，胎囊，羊水袋
In the centre of the amniotic sac, a little heart was beating away.在羊膜囊的中心，跳动着一颗小小的心脏。
An amniotic sac contains a fetus during pregnancy. 怀孕期间，胎儿包裹在羊膜囊里。
Synonym
amnion
During pregnancy, the amniotic sac is formed within the uterus and encloses the fetus.
Part of the membrane around the baby's amniotic sac burst.
The amniotic sac bursts during the birthing process.
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