from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The scientific study of the biological, psychological, and sociological phenomena associated with old age and aging.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun the study of the elderly, and of the aging process itself.
  • noun the branch of science that deals with the problems of aged people. It is to be distinguished from geriatrics, which is the study of the diseases of the elderly. Gerontology covers the social, psychological and biological aspects of aging.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the branch of medical science that deals with diseases and problems specific to old people


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek γέρων (gerōn, "old man").



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