Senescence literally means "the process of growing old." It's defined as the period of gradual decline that follows the development phase in an organism's life. So senescence in humans would start sometime in your 20s, at the peak of your physical strength, and continue for the rest of your life.

What is senescence stage?

1 : the state of being old : the process of becoming old. 2 : the growth phase in a plant or plant part (such as a leaf) from full maturity to death.

Is senescence old age?

Old age, also called senescence, in human beings, the final stage of the normal life span. ... For statistical and public administrative purposes, however, old age is frequently defined as 60 or 65 years of age or older.