2 ผลลัพธ์ สำหรับ *pitchstone*
หรือค้นหา: pitchstone, -pitchstone-

WordNet (3.0)
pitchstone(n) dark acid granitic glass

Collaborative International Dictionary (GCIDE)
Pitchstone

n. (Geol.) An igneous rock of semiglassy nature, having a luster like pitch. [ 1913 Webster ]


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