activated alumina

noun

: a porous highly adsorptive alumina made usually by heating alumina hydrates and used chiefly in drying gases and liquids

Word History

First Known Use

circa 1943, in the meaning defined above

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