juvenescent

ju·ve·nes·cent

 (jo͞o′və-nĕs′ənt)
adj.
Becoming young or youthful.

[Latin iuvenēscēns, iuvenēscent-, present participle of iuvenēscere, to reach the age of youth, from iuvenis, young; see juvenile.]

ju′ve·nes′cence n.

ju•ve•nes•cent

(ˌdʒu vəˈnɛs ənt)

adj.
1. being or becoming youthful; young.
2. having the power to make young or youthful.
[1815–25; < Latin juvenēscent-, s. of juvenēscēns, present participle of juvenēscere to become youthful, derivative of juvenis young; see -escent]
ju`ve•nes′cence, n.
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Four years after the first doctors appeared on TV to promote the supposed juvenescent, the FDA says the company's conduct is "under active investigation.