rock froth
noun
Molten or solidified lava that has expanded or that is low in density due to the presence of internal bubbles of steam or gas.
Origin
Late 19th century.
| 单词 | rock froth |
| 释义 | rock frothnoun Molten or solidified lava that has expanded or that is low in density due to the presence of internal bubbles of steam or gas. Origin |
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