n. The science of dating samples of rock or sediment.
n. Any one of the methods by which the age of different samples of rock can be determined.
The Century Dictionary and Cyclopedia
n. Geologic chronology; the application of time measures to geologic succession.
Word Usage
"Milton was swallowing, hook, line and sinker, a litany of Youth Earth Creationist arguments about geochronology—but without any religious motivation."