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geriatric

[jer-ee-a-trik, jeer-]
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adjective
  1. of or relating to geriatrics, old age, or aged persons.
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noun
  1. Slang. an old person.
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Origin of geriatric

1925–30; < Greek gér(ōn) old man + iatric
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for geriatric

geriatric

adjective
  1. of or relating to geriatric medicine or to older people
  2. offensive (of people or machines) old, obsolescent, worn out, or useless
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noun
  1. old-fashioned, offensive an elderly person
  2. informal, offensive an older person considered as one who may be disregarded as senile or unable to look after his or her own best interests
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Word Origin

C20: from Greek gēras old age + iatric
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 geriatric

adj.

1909, formed in English from Greek geras, geros "old age" (from PIE root *gere- "to grow old" (see gerontology) + iatrikos "of a physician," from iatros (see -iatric).

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Online Etymology Dictionary, © 2010 Douglas Harper

geriatric in Medicine

geriatric

(jĕr′ē-ătrĭk)
adj.
  1. Of or relating to geriatrics.
  2. Of or relating to old age or to the aging process.
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n.
  1. An old person.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.