differential
/ˌdɪfəˈrɛnʃəl/
adjective
always used before a noun
[more ~; most ~] formal :relating to or based on a difference :treating some people or groups differently from others
noun
plural -tials
[count] a difference between people or things
technical :a gear or an arrangement of gears in a vehicle that allows one wheel to turn faster than another when the vehicle is going around a curve - called also differential gear;