Meaning of geratology

ger•a•tol•o•gy

Pronunciation: ( jer"u-tol'u-jē), [key]
— n. Biol.
  1. the study of the diminution or decline of life, as in an individual animal or a species approaching extinction.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.