An ultrasound of a human fetus.
A baby that has been in its mother's stomach growing for 18 weeks is an example of a fetus.
Origin of fetusMiddle English from Classical Latin fetus, foetus, a bringing forth, progeny; as adjective , pregnant, fruitful: see female
- The unborn young of a viviparous vertebrate having a basic structural resemblance to the adult animal.
- In humans, the unborn young from the end of the eighth week after conception to the moment of birth, as distinguished from the earlier embryo.
Origin of fetusMiddle English from Latin fētus offspring ; see dhē(i)- in Indo-European roots.
(plural fetuses) (Canada, US)
The form fetus is preferred in North America and in the scientific community, whereas foetus is still commonly used in Commonwealth nations.
From Latin fētus (“offspring”).