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senescent

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se⋅nes⋅cent

[si-nes-uhnt]
–adjective
growing old; aging.

Origin:
1650–60; < L senēscent- (s. of senēscēns) prp. of senēscere to grow old, equiv. to sen- old + -ēscent- -escent


se⋅nes⋅cence, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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se·nes·cent   (sĭ-něs'ənt)   
adj.  Growing old; aging.

[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.]
se·nes'cence n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

senescent 
1656, from L. scenescens, prp. of senescere "to grow old," from senex "old" (see senile).
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: se·nes·cent
Pronunciation: si-'nes-&nt
Function: adjective
: relating to, characterized by, or associated withsenescence <senescent persons> <senescent arthritis>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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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