— geratologic /jer'euh tl oj"ik/ , geratologous /jer'euh tol"euh geuhs/ , adj.
/jer'euh tol"euh jee/ , n. Biol.
the study of the diminution or decline of life, as in an individual animal or a species approaching extinction.
[ 1880-85; gerat - (erroneously taken as the s. of Gk gêras old age) + -O- + -LOGY ]