/ rɪˈstɔːrətɪv; NAmE / adjective , noun
■ adjective
1.
( formal ) making you feel strong and healthy again :
the restorative power of fresh air
2.
( medical ) connected with treatment that repairs the body or a part of it :
restorative dentistry / surgery
■ noun
( old-fashioned ) a thing that makes you feel better, stronger, etc.
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WORD ORIGIN
late Middle English : from an Old French variant of restauratif , -ive , from restorer , from Latin restaurare rebuild, restore.