Definition of "senescence"

Organized shuffleboard has always filled me with dread. Everything about it suggests infirm senescence and death: it’s like it’s a game played on the skin of a void and the rasp of the sliding puck is the sound of that skin getting abraded away bit by bit.

1997, David Foster Wallace, “A Supposedly Fun Thing I'll Never Do Again”, in A Supposedly Fun Thing I'll Never Do Again, Kindle edition, Little, Brown Book Group

Over the next 150 years the known age of the Earth expanded a millionfold and lost worlds of the past were found to have overflowed with species now gone. The chain stretched, aged, and eventually succumbed to senescence.

2012, Lydia Pyne, Stephen J. Pyne, chapter 6, in The Last Lost World, Penguin

Tests in mice found that inducing senescence in bile duct cells - mimicking the process seen in human bile duct disease - led to liver scarring and damage of liver function.

2018, University of Edinburgh, "Liver Study Offers Insights into Hard-to-treat Diseases" (9 March 2018), Drug Discovery & Development.