sedimentary rock

noun

: rock formed of mechanical, chemical, or organic sediment: such as

a

: clastic rock (as conglomerate, sandstone, or shale) formed of fragments of other rock transported from its source and deposited in water

b

: rock (as rock salt or gypsum) formed by precipitation from solution

c

: rock (as limestone) formed from secretions of organisms

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