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senescent

[si-nes-uh nt] /sɪˈnɛs ənt/
adjective
1.
growing old; aging.
2.
Cell Biology. (of a cell) no longer capable of dividing but still alive and metabolically active.
Origin
1650-1660
1650-60; < Latin senēscent- (stem of senēscēns) present participle of senēscere ‘to grow old’, equivalent to sen- ‘old’ + -ēscent- -escent
Related forms
senescence, noun
unsenescent, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un senescent

senescent

/sɪˈnɛsənt/
adjective
1.
growing old
2.
characteristic of old age
Derived Forms
senescence, noun
Word Origin
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
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Word Origin and History for un senescent

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
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un senescent in Medicine

senescent se·nes·cent (sĭ-něs'ənt)
adj.
Growing old; aging.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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