gerontology

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aging

 [āj´ing]
the gradual changes in the structure of any organism that occur with the passage of time, that do not result from disease or other gross accidents, and that eventually lead to the increased probability of death as the individual grows older. See also aged and senescence, and see the Atlas on Aging.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ger·on·tol·o·gy

(jer'on-tol'ŏ-jē),
The scientific study of the clinical, sociologic, biologic and psychological phenomena related to aging.
Synonym(s): geratology
[geronto- + G. logos, study]
Farlex Partner Medical Dictionary © Farlex 2012

gerontology

(jĕr′ən-tŏl′ə-jē)
n.
The scientific study of the biological, psychological, and sociological phenomena associated with old age and aging.

ge·ron′to·log′i·cal (jə-rŏn′tə-lŏj′ĭ-kəl), ge·ron′to·log′ic (-lŏj′ĭk) adj.
ger′on·tol′o·gist n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

gerontology

Geriatics The systematic study of aging and age-related phenomena; senescence is attributed to
1. Accumulation of degradation products, coupled with a cell's ↑ inability to metabolize the products and/or.
2. Activation of longevity-determining or aging genes, that may be intimately linked to certain oncogenes–eg, c-fos, which evokes uncontrolled cell proliferation. See Garbage can hypothesis.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

ger·on·tol·o·gy

(jer'ŏn-tol'ŏ-jē)
The scientific study of the process and problems of aging.
[geronto- + G. logos, study]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

gerontology

The study of the biology, psychology and sociology of ageing. Gerontology is concerned with the changes that occur in the cells, tissues and organs of the body with age, with the natural limits of cell reproduction, the causes of natural cell death, the effects of life style and physical activity on longevity and the psychological and sociological effects of ageing.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

ger·on·tol·o·gy

(jer'ŏn-tol'ŏ-jē)
Scientific study of clinical, sociologic, biologic, and psychological phenomena related to aging.
[geronto- + G. logos, study]
Medical Dictionary for the Dental Professions © Farlex 2012