Old age; accumulated damage to macromolecules, cells, tissues and organs with the passage of time.
The state or process of ageing, especially in humans; old age.
Fruit senescence, leading to ripening of fruit.
Ceasing to divide by mitosis because of shortening of telomeres or excessive DNA damage.
Condition when the cell ceases to divide.
A measure of the amount of time a person has been a member of an organization, as compared to other members, and with an eye towards awarding privileges to those who have been members longer.