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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 ?
This is the river of the great 19th-century landscapists; of Cole, Cropsey and Church, and at the end of the summer it lies motionless under the haze as under a light coat of varnish.
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- Judith Thurman
Fact of the day
The airplane Buddy Holly died in was the "American Pie." (Thus the name of the Don McLean song.)