sima

1 of 2

si·​ma

ˈsīmə

variant spelling of cyma

sima

2 of 2

noun

"

plural -s

: basic igneous rock whether solid or molten compare sial

simatic

(ˈ)sī¦matik

adjective

Word History

Etymology

Noun

German, from silicium + magnesium

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