1. 背：利用人类生理的(physiological)或行为上的(behavioral)独一无二的特徵来辨识使用者的身分,成为安全科技之重要趋势.人的手,目前所用的特徵有手掌正面(palmar)的指纹,掌纹,手背(dorsum)的血管.手的几何(Hand Geometry)即手的几何结构,

2. 背部：背部 dorsum | 背部离轴的(生物) abaxial | 背槽 back-trough

3. 舌背：dorso-velar sound 舌面後音 | dorsum 舌背 | double accusative 雙賓格

4. 环形山脊：Division 环缝 | Dorsum 环形山脊 | Facula 光斑

noun

1. the back of the body of a vertebrate or any analogous surface (as the upper or outer surface of an organ or appendage or part)

e.g. the dorsum of the foot

2. the posterior part of a human (or animal) body from the neck to the end of the spine

e.g. his back was nicely tanned

Synonym: back