ferrous hydroxide

noun

: a basic compound Fe(OH)₂ that is usually obtained as a nearly white gelatinous precipitate by adding an alkali to a ferrous salt solution and that turns green and finally reddish brown in air on oxidation to ferric hydroxide

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