'Wollastonite' definitions:
Definition of 'wollastonite'
From: WordNet
noun
A white or greyish mineral typically found in metamorphic limestone; a silicate of calcium
Definition of 'Wollastonite'
From: GCIDE
- Wollastonite \Wol"las*ton*ite\, n. [After Dr. W. H. Wollaston, an English chemist, who died in 1828.] (Min.) A silicate of lime of a white to gray, red, or yellow color, occurring generally in cleavable masses, rarely in tabular crystals; tabular spar. [1913 Webster]