ruthenium oxide

noun

: an oxide of ruthenium: such as

a

: the dark blue crystalline dioxide RuO₂ formed by heating ruthenium in air

b

: the explosive volatile poisonous yellow crystalline tetroxide RuO₄ having a disagreeable odor

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