calcium hydride

noun

: a saltlike compound CaH₂ that is white and crystalline when pure but is usually obtained in gray to gray-brown lumps and that is used chiefly as a reducing agent in the preparation of powdered metals, as a portable source of hydrogen, and as a drying agent

called also hydrolith

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