| 单词 | Water of Ayr stone |
| 释义 | Water of Ayr stone/ˌwɔːtə(r) əv ˈɛː ˌstəʊn/Now chiefly historical noun A kind of fine-grained grey stone (either a hardened shale or a claystone) formerly obtained along the banks of the Ayr and used for hones and whetstones and for polishing stone and metal.
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