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gerontic

[juh-ron-tik]
adjective
  1. geriatric.
  2. of or relating to the last phase in the life cycle of an organism or in the life history of a species.
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Origin of gerontic

1880–85; < Greek gerontikós of old men, equivalent to geront- (stem of gérōn old man) + -ikos -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for gerontic

gerontic

adjective
  1. biology of or relating to the senescence of an organism
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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