Definition of differential adjective from the Oxford Advanced Learner's Dictionary

 

differential

 adjective
adjective
BrE BrE//ˌdɪfəˈrenʃl//
 
; NAmE NAmE//ˌdɪfəˈrenʃl//
 
 
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[only before noun] (formal) showing or depending on a difference; not equal the differential treatment of prisoners based on sex and social class differential rates of pay Word Origin mid 17th cent.: from medieval Latin differentialis, from Latin differentia ‘difference’from different- ‘carrying away’, from the verb differre, from dis- ‘from, away’ + ferre ‘bring, carry’.
See the Oxford Advanced American Dictionary entry: differential