(The word "adoptee" is someone who is adopted, or taken under guardianship.)

"After his parents died, the boy had no family and became an adoptee."

"Sarah is the adoptee child in our family, but I usually get her mixed up with Sally: in short, I can't remember which of our children is the adoptee."

An adoptee is a person who is adopted, an adopted son or daughter, or a foster child.

King-on Mao has written the book "Fugitive Visions: An Adoptee's Return to Korea," where he explores his experiences as a Korean adoptee reconnecting with his birth country. He has also written articles on transnational adoption and identity.

twin and adoptee

an adoptee, or adopted child