| 单词 | porcelain grain |
| 释义 | > as lemmasporcelain grain porcelain grain n. now rare ΚΠ 1794 R. Kirwan Elements Mineral. (ed. 2) I. 2nd App. 436 All fused earthy substances present either a porcelain grain, always glazed if the fusion extended to even one half of the whole, or conchoidal and glazed if it extended farther. 1811 J. Pinkerton Petralogy II. xii. vii. 286 In this heat, many stones of the argillaceous genus..alter their colour, become porous, assume a porcelain grain, and consequently begin to vitrify. 1878 T. Kentish Pyrotechnist's Treas. 188 (table) Charcoal. Coke grains. Porcelain grains. 1992 Extraction (Part ii) in alt.drugs (Usenet newsgroup) 25 Feb. Also useful: acid/base indicator paper, boiling chips (porcelain grains) and activated charcoal. 2009 S. Newcomb World in Crucible x. 142/1 Kirwan found most stones called ‘basalt’ lacked what he considered marks of fusion, the porcelain grain and glazing, and some air bubbles. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。