blood relative

Noun

A person who is related to another through a common ancestor, and not merely by marriage or adoption.

Japanese Meaning

血縁者 / 血族 / 血のつながった親族

She was relieved to learn that the donor was a blood relative, reducing the risk of rejection.

ドナーが血縁者であると分かり、拒絶反応のリスクが減るため彼女は安心した。

Sense（1）

A person who is related to another through a common ancestor, and not merely by marriage or adoption.

blood relatives

（ plural ）