bone age マイ単語帳に追加

骨年齢

a person's age measured by matching their bone development (as shown by X rays) with bone development of an average person of known chronological age.

（X線で示された）人の骨の発達過程と周知の生活年齢の平均的な人の骨の発達過程をマッチングして測られた年齢。