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单词 phonolite
释义 phonolite
 —phonolitic /fohn'l it"ik/,  adj.  
 /fohn"l uyt'/,  n.  
 a fine-grained volcanic rock composed chiefly of alkali feldspar and nepheline, some varieties of which split into pieces that ring on being struck.
 [1820-30; < F < G Phonolith. See PHONO-, -LITE]
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