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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 su·per·fe·ta·tion /-fiˈteʃən/
 異期複孕; 重孕

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 su·per·fe·ta·tion /ˌsupɝfɪˈteʃən/ 名詞
 異期複孕,重孕,複孕

From: Webster's Revised Unabridged Dictionary (1913)

 Su·per·fe·ta·tion n.  Physiol. The formation of a fetus at the result of an impregnation occurring after another impregnation but before the birth of the offspring produced by it. This is possible only when there is a double uterus, or where menstruation persists up to the time of the second impregnation.
    In then became a superfetation upon, and not an ingredient in, the national character.   --Coleridge.
 

From: WordNet (r) 2.0

 superfetation
      n : 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"