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superfetation
'superfetation' - used as a noun
1. 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'
  • fecundation
  • fertilisation
  • fertilization
  • impregnation
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    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. - Click here to find out.
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    The airplane Buddy Holly died in was the "American Pie." (Thus the name of the Don McLean song.)