From Longman Dictionary of Contemporary Englishsenescentse‧nes‧cent /səˈnesənt/ adjective technical OLD/NOT YOUNGbecoming old and showing the effects of getting older SYN ageing a senescent industry —senescence noun [uncountable]
Examples from the Corpus
senescent• Mr Lee seemed a gentleman, but senescent, and a gentleman from quite another, distant age.• Unusual numbers of dead holly trees with senescent branches or main trunks; 2.• His brief was to convey coal as a developing rather than a senescent industry.• I stopped walking and stared wide-eyed as the rest of the senescent strollers proceeded out of this dimension.From Longman Business Dictionarysenescentse‧nes‧cent /səˈnesənt/ adjective formal getting older and showing the effects of thisCoal is often viewed as a senescent industry.Origin senescent (1600-1700) Latin present participle of senescere “to grow old”, from senex; → SENIOR1 