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'superfetation' - used as a noun
fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time
superfetation is normal in some animal species
Variations of 'superfetation'
Past Words of the day
Who Said that ?
If you're a singer you lose your voice. A baseball player loses his arm. A writer gets more knowledge, and if he's good, the older he gets, the better he writes.
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- Mickey Spillane
Fact of the day
The Snickers chocolate bar was invented in 1930.