n.
The scientific study of the biological, psychological, and sociological phenomena associated with old age and aging.
gerontological ge·ron'to·log'i·cal (jə-rŏn'tə-lŏj'ĭ-kəl) or ge·ron'to·log'ic (-lŏj'ĭk) adj.
gerontologist ger'on·tol'o·gist n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
