| 单词 | pencil stone |
| 释义 | > as lemmaspencil stone pencil stone n. now rare pyrophyllite or a similar material used to make slate pencils. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > pyrophyllite pyrophyllite1830 pencil stone1868 1868 J. D. Dana Syst. Mineral. (ed. 5) 455 It [sc. pyrophyllite] is used for slate pencils, and is sometimes called pencil-stone. 1937 Thorpe's Dict. Appl. Chem. (ed. 4) I. 162/2 Besides being employed as material for carving, these minerals [sc. pyrophyllite, steatite, and pinite] are used for slate-pencils (pencil-stone) and for tailor's chalk (French chalk). 1994 Summary of World Broadcasts Pt.3: Pacific; China (B.B.C.) (Nexis) 8 Apr. FE/1966/G A non-metallugical limited company in Fuzhou carried out open operations, long-prohibited in China, at its pyrophyllite pencil stone crushing section. < as lemmas |
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