locking stone
noun
1 Clockmaking and Watchmaking a locking pallet in the form of a ruby or other jewel.
2= keystone.
Origin
Mid 19th century.
| 单词 | locking stone |
| 释义 | locking stonenoun 1 Clockmaking and Watchmaking a locking pallet in the form of a ruby or other jewel. 2= keystone. Origin |
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