buhr·stone also burr·stone 
(bûrstōn′)
(bûrstōn′)n.
A tough, silicified limestone formerly used to make millstones. It is typified by the presence of multiple cavities that originally housed fossilized shells.
[Variant of BURR1 + STONE.]
| 单词 | buhrstone |
| 释义 | buhr·stone also burr·stone (bûrstōn′)n. A tough, silicified limestone formerly used to make millstones. It is typified by the presence of multiple cavities that originally housed fossilized shells. [Variant of BURR1 + STONE.] |
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