Definition of revirescence in US English:

revirescence

noun

rare
  • The action, quality, or fact of growing fresh or new again; return to a youthful or flourishing condition; an instance of this.

Origin

Mid 18th century; earliest use found in William Warburton (1698–1779), bishop of Gloucester and religious controversialist. From revirescent or its etymon classical Latin revirēscent-, revirēscēns: see -ence.