follow Dictionary.com

11 Trending Words of 2014

periclase

[per-i-kleys, -kleyz] /ˈpɛr ɪˌkleɪs, -ˌkleɪz/
noun
1.
a cubic mineral, native magnesia, MgO, occurring usually in metamorphosed dolomite.
Origin
1835-1845
1835-45; < German Periklas < New Latin periclasia, equivalent to peri- peri- + Greek klás(is) a breaking (cf. -clase) + -ia -ia
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for periclase

periclase

/ˈpɛrɪˌkleɪs/
noun
1.
a mineral consisting of magnesium oxide in the form of isometric crystals or grains: occurs in metamorphosed limestone
Derived Forms
periclastic (ˌpɛrɪˈklæstɪk) adjective
Word Origin
C19: from New Latin periclasia, from Greek peri very + klasis a breaking, referring to its perfect cleavage
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Encyclopedia Article for periclase

magnesium oxide mineral (MgO) that occurs as colourless to grayish, glassy, rounded grains in marble and in some dolomitic limestones, where it formed by the metamorphosis of dolomite at high temperatures. Rocks containing periclase have been identified at Monte Somma and Predazzo, Italy; Nordmark and Langban, Swed.; and Crestmore, Calif. Periclase may be a major component of the mantle of the Earth. For detailed physical properties, see oxide mineral (table)

Learn more about periclase with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for periclase

Few English speakers likely know this word

Word Value for periclase

0
0
Scrabble Words With Friends