单词 |
pearl-stone |
释义 |
ˈpearl-stone The same as perlite.
1800Henry Epit. Chem. (1808) 364 The same skilful analyst has found potash in Hungarian pearl-stone. 1852Th. Ross Humboldt's Trav. I. ii. 102, I consider even the pearlstone as an unvitrified obsidian. |

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