遺い残ざん

noun, noun which may take the genitive case particle 'no'

persistence; vestigial remnant

Medical and biological term for something that remains or persists from an earlier stage, especially a vestigial structure or a persistent embryonic remnant.

• 胎たい生せい期きの遺い残ざんが成せい人じんになっても残のこることがある。