Noun: superfetation ,soo-pu(r)-fee'tey-shun
- Fertilization of a second ovum after a pregnancy has begun; results in two foetuses of different ages in the uterus at the same time
"superfetation is normal in some animal species"
Derived forms: superfetations
Type of: fecundation, fertilisation [Brit], fertilization, impregnation
Encyclopedia: Superfetation