whin·stone 
(wĭnstōn′, hwĭn-)
(wĭnstōn′, hwĭn-)n.
Any of various hard, dark-colored rocks, especially basalt and chert.
| 单词 | whinstone |
| 释义 | whin·stone (wĭnstōn′, hwĭn-)n. Any of various hard, dark-colored rocks, especially basalt and chert. |
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