/ rɪˈmiːdiəl; NAmE / adjective [ only before noun ]
1.
aimed at solving a problem, especially when this involves correcting or improving sth that has been done wrong :
remedial treatment (= for a medical problem)
Remedial action must be taken now.
2.
connected with school students who are slower at learning than others :
remedial education
a remedial class
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WORD ORIGIN
mid 17th cent.: from late Latin remedialis , from Latin remedium cure, medicine, from re- back (also expressing intensive force) + mederi heal.