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English definition of “amniocentesis”

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amniocentesis

noun [U or S] uk   /ˌæm.ni.əʊ.senˈtiː.sɪs/ us    /-oʊ-/
a medical test in which a needle is used to remove a small amount of the liquid that surrounds a baby in the mother's womb in order to examine the baby's condition
(Definition of amniocentesis from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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