adoptee vs seedling

adoptee

noun
  • A person who was adopted as a child. 

  • Synonym of adopter 

  • An adopted son or daughter. 

seedling

noun
  • one grown in a nursery for transplanting. 

  • a tree smaller than a sapling. 

  • A young plant grown from seed. 

How often have the words adoptee and seedling occurred in a corpus of books? (source: Google Ngram Viewer )