noun
differential gear; differential gear assembly
Technical term used in automotive and mechanical engineering contexts.
この車の差動歯車装置は、コーナリング時のタイヤの回転差を吸収する。
This car's differential gear absorbs the difference in wheel rotation during cornering.
Compound of 差動 (differential motion) + 歯車 (gear) + 装置 (device).