JUVENESCENCE Meaning of JUVENESCENCE in English [ ˌdʒu:və'nɛs(ə)ns ]■ noun formal youth.Derivativesjuvenescent adjective OriginC19: from L. juvenescent- , juvenescere 'reach the age of youth', from juvenis 'young'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004