Quiz: Remember the definition of mal de mer?


[woo l-uh-stuh-nahyt] /ˈwʊl ə stəˌnaɪt/
a mineral, calcium silicate, CaSiO 3 , occurring usually in fibrous white masses.
1815-25; named after W. H. Wollaston; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
British Dictionary definitions for wollastonite


a white or grey mineral consisting of calcium silicate in triclinic crystalline form: occurs in metamorphosed limestones. Formula: CaSiO3
Word Origin
C19: named after W. H. Wollaston (1766–1828), English physicist
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
wollastonite in Science
A white to gray triclinic or monoclinic mineral found in metamorphic rocks and used in ceramics, paints, plastics, and cements. Chemical formula: CaSiO3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Article for wollastonite

white, glassy silicate mineral that commonly occurs as masses or tabular crystals with other calcium-containing silicates (e.g., diopside, tremolite, garnet, and epidote) in metamorphosed limestones. Deposits are found in Ciclova Romina, Rom.; Monte Somma, Italy; and Pargas, Fin. Occurrences in the United States include Utah; Isle Royale, Mich.; Riverside, Calif.; and Essex county, N.Y., where it is mined. For detailed physical properties, see silicate mineral (table)

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

Word of the Day

Difficulty index for wollastonite

Few English speakers likely know this word

Word Value for wollastonite

Scrabble Words With Friends