cyclothem

noun

cy·​clo·​them

plural -s

: a stratigraphic unit consisting of a series of beds deposited during a single sedimentary cycle

Word History

Etymology

cycl- + Greek thema something laid down

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