Pronunciation: (bûr'stōn"), Strict Standards: Non-static method FenSites::linkTo() should not be called statically in /site/html/dictionary/burstone.html on line 71 [key]
1. any of various siliceous rocks used for millstones.
2. a millstone of such material. Also,buhrstone,burrstone.Also called buhr, burr.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.