Definition of fetus in English:
noun (plural fetuses)
- A small subset of fetuses with large lung lesions will become hydropic, deteriorate rapidly, and die in utero.
- Feedback is currently being used in a trial of early versus delayed delivery for preterm, growth retarded fetuses.
- How well a woman and the fetus do during pregnancy depends upon the type of heart problem.
late Middle English: from Latin fetus 'pregnancy, childbirth, offspring'.
The spelling foetus has no etymological basis but is recorded from the 16th century and until recently was the standard British spelling in both technical and non-technical use. In technical usage fetus is now the standard spelling throughout the English-speaking world, but foetus is still found in British English outside technical contexts.