1. plural fetuses. [Latin faetus.] The young of viviparous animals in the womb, and of oviparous animals in the egg, after it is perfectly formed; before which time it is called embryo. A young animal then is called a fetus from the time its parts are distinctly formed, till its birth.
Word of the Day: Catachrestical
The young or embryo of an animal in the womb, or in the egg; often restricted to the later stages in the development of viviparous and oviparous animals, embryo being applied to the earlier stages.
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