senescent

[si-nes-uh nt]
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adjective
  1. growing old; aging.
  2. Cell Biology. (of a cell) no longer capable of dividing but still alive and metabolically active.

Origin of senescent

1650–60; < Latin senēscent- (stem of senēscēns) present participle of senēscere ‘to grow old’, equivalent to sen- ‘old’ + -ēscent- -escent
Related formsse·nes·cence, nounun·se·nes·cent, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for senescent

senescent

adjective
  1. growing old
  2. characteristic of old age
Derived Formssenescence, noun

Word Origin for senescent

C17: from Latin senēscere to grow old, from senex old
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for senescent
adj.

1650s, from Latin senescentem (nominative scenescens), present participle of senescere "to grow old," from senex "old" (see senile).

Online Etymology Dictionary, © 2010 Douglas Harper

senescent in Medicine

senescent

[sĭ-nĕsənt]
adj.
  1. Growing old; aging.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.