Any of various hard, compact, igneous or metamorphic rocks rich in silica; esp. (a) hornstone or chert; (b) felsite.
| 单词 | θ5760 |
| 释义 | the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > felsite (4) petrosilex1770 Any of various hard, compact, igneous or metamorphic rocks rich in silica; esp. (a) hornstone or chert; (b) felsite. felsite1794 = felstone, n. patrinite1811 Geology. = phonolite, n. Obsolete. rare. felstone1858 (See quot. 1865.) |
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