| 单词 | welsh oilstone |
| 释义 | > as lemmasWelsh oilstone Welsh oilstone n. now rare a fine-grained, siliceous rock quarried in North Wales and used for oilstones. ΚΠ 1835 Trans. Soc. Arts 1834–5 in Mechanics' Mag. 4 July 268/1 Idwall, or Welsh oil-stone, is generally harder, but..in consequence of its being more expensive, is in less general use. 1921 J. A. Audley Silica & Silicates i. 31 An oilstone from Whittle Hill in Charnwood Forest..is a fine-grained, silicious slaty rock. Welsh oilstone is a somewhat similar material. 1949 F. J. North et al. Snowdonia 66 ‘Welsh oilstone’ from near Llyn Idwal and other places in our area has been used on account of its hardness and fine texture for grinding small blades. 2004 I. Jeffrey in N. Sinclair Kyffin Williams 18/2 There are also what might be called vernacular rocks: Maesgwn Slates, Gwastadnant Grits, Welsh Oilstone, Old Red Sandstone. < as lemmas |
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