remediation

Concise Oxford English Dictionary © 2008 Oxford University Press:
remediation /rɪˌmiːdɪˈeɪʃ(ə)n/

▶noun

• 1 the action of remedying something, in particular environmental damage.

• 2 the giving of remedial teaching or therapy.

– derivatives
remediate verb.

– origin C19: from L. remediatio(n-), from remediare (see remedy).