rejuvenesce verb. 
[rɪ,dʒu:vɪ'nɛs] L19.[Late Latin rejuvenescere, formed as RE- + Latin juvenis young: see -ESCE.]1.  verb intrans. Become young again; 
spec. in 
Biology, (of cells) gain fresh vitality. 
L19.2.  verb trans. Biology. Impart fresh vitality to (cells). 
L19.  [TahlilGaran] English Dictionary ▲