periclasite\ˌperəˈklā|ˌsīt, pəˈriklə|, |ˌzīt\
Definition of periclase
: native magnesia MgO in granular forms or isometric crystals (hardness 6, specific gravity 3.67–3.90)
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of periclase
periclase from German periklas, modification of Italian periclasia, from Greek periklasis act of twisting or breaking around (from periklan to twist around, break around—from peri- + klan to break—+ -sis) + -ia -y (from Latin); periclasite from periclase + -ite — more at halt (lame)
Seen and Heard
What made you want to look up periclase? Please tell us where you read or heard it (including the quote, if possible).