American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Growing old; aging.
Century Dictionary and Cyclopedia
- Growing old; aging: as, a senescent beau.
GNU Webster's 1913
- adj. Growing old; decaying with the lapse of time.
- adj. growing old
- From Latin senescens, present participle of senescere ("to grow old"), from senere ("to be old"), from senex ("old"). (Wiktionary)
- Latin senēscēns, senēscent-, present participle of senēscere, to grow old, inchoative of senēre, to be old, from senex, sen-, old; see sen- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Using a complex “systems biology” approach, the researchers, in conjunction with scientists from the University of Ulm in Germany, had set out to discover why cells become senescent, or, in other words, grow old.”
“Scientists are closing in on the mechanism of what are called "senescent cells," which cause the tissue deterioration responsible for aging.”
“Reporting in the journal Nature, researchers from the Mayo Clinic have found a way to clear away what are called senescent cells, which are cells that have stopped dividing and build up as people and animals age. senescent cells are so bad for the body:”
“For the first time, scientists showed in mice that removing a type of aging cell from the body that has stopped dividing -- known as a senescent cell -- can delay or prevent age-related health issues.”
“When they get too short, the cell no longer can divide and becomes inactive or "senescent" or dies.”
“These healthy liver cells were then implanted into the livers of young rats (10 weeks, the equivalent of young adulthood) and "senescent" rats (more than 35 weeks).”
“Even when he was senescent and behaving erratically, he still intimidated people.”
“Extensive research is still necessary to test whether the clearance of senescent cells would have the same effect in mice that age normally and whether there are different effects in different tissues, such as the brain as compared with muscle tissue, said Dr. Sierra of the National Institute on Aging.”
“Researchers at the Mayo Clinic in Rochester, Minn., found for the first time that by using a drug to target and kill senescent cells, they could essentially freeze some aspects of the aging process.”
“If you could clear senescent cells, you perhaps could treat age-related diseases as a group rather than individually," said Jan van Deursen, senior author of the paper and a professor in the departments of biochemistry and pediatric and adolescent medicine at Mayo.”
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