Rejuvenescence /(-n?s"sens)/

Re·ju·ve·nes·cence

Rejuvenescence

n.
  1. A renewing of youth; the state of being or growing young again.
  2. A method of cell formation in which the entire protoplasm of an old cell escapes by rupture of the cell wall, and then develops a new cell wall. It is seen sometimes in the formation of zoospores, etc. (Bot.)