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cainogenesis

资料来源 : WordNet®

cainogenesis
     n : introduction during embryonic development of characters or
         structure not present in the earlier evolutionary history
         of the strain or species (as addition of the placenta in
         mammalian evolution) [syn: {cenogenesis}, {kenogenesis},
         {caenogenesis}, {kainogenesis}] [ant: {palingenesis}]
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