单词 | pegmatite |
释义 | peg·ma·tite ![]() n. A coarse-grained granite, sometimes rich in rare elements such as uranium, tungsten, and tantalum. [Greek pēgma, pēgmat-, something fastened together (from pēgnunai, to fasten; see pag- in the Appendix of Indo-European roots) + -ITE1.] peg′ma·titic (-tĭtĭk) adj. |
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