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English definition of “fetus”

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noun [C]  /ˈfi·t̬əs/ us  
a human being or animal as it is developing in the uterus before birth, after the organs have started to form
adjective [not gradable]  /ˈfi·t̬əl/ us  
The electronic device monitored the fetal heart rate.
(Definition of fetus from the Cambridge Academic Content Dictionary © Cambridge University Press)
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