geochrony

noun

ge·​och·​ro·​ny

jēˈäkrənē

plural -es

: geologic chronology : a system of time divisions used in geology

Word History

Etymology

ge- + Greek chronos time + English -y

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now