sodium oxide

noun

: an oxide of sodium

especially : the hygroscopic amorphous monoxide Na₂O that reacts violently with water to yield sodium hydroxide and that is obtained chiefly as an intermediate in the manufacture of sodium peroxide

The Ultimate Dicitonary 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