kenogenesis   (TTS Sound)

The kenogenesis has 1 Senses.

• caenogenesis, kenogenesis, cainogenesis, cenogenesis, kainogenesis
• introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species (such as the addition of the placenta in mammalian evolution)
• これまでの系統や種の進化の発達史上現れたことのない性質や形態が（哺乳類の進化における胎盤の追加のように）発達の初期の間に現れること