Noun
limited-slip differential (plural limited-slip differentials)
(mechanics) A type of differential that allows its output shafts to rotate at different speeds but can limit the maximum difference in angular velocity between the output shafts, allowing greater torque to be applied to the slower-spinning shaft(s) and generally resulting in better traction than older-design differentials. [from 20th c.]
Synonyms: LSD (abbreviation), limited-slip diff (shortened form)