[jer-uhn-tol-uh-jee, jeer-]
the branch of science that deals with aging and the problems of aged persons.

1900–05; geronto- + -logy

gerontological [juh-ron-tl-oj-i-kuhl] , adjective
gerontologist, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
gerontology (ˌdʒɛrɒnˈtɒlədʒɪ)
Compare geriatrics the scientific study of ageing and the problems associated with older people

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1903, coined in Eng. from Gk. geron (gen. gerontos) "old man," from PIE base *ger(e)- "to become ripe, grow old" (cf. Skt. jara "old age," Avestan zaurvan "old age," Ossetic zarond "old man").
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

gerontology ger·on·tol·o·gy (jěr'ən-tŏl'ə-jē)
The scientific study of the biological, psychological, and sociological phenomena that are associated with old age and aging.

ger'on·tol'o·gist n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Cultural Dictionary

gerontology definition

A medical specialty that focuses on the care and treatment of the elderly.

Note: The large number of aging “baby boomers” has increased both the profile and importance of this specialty.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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