单词 | quartzless |
释义 | quartzlessadj. Geology. Lacking or free from quartz. ΚΠ 1871 Amer. Jrnl. Sci. 101 83 The same process with micaceous granites affords a quartzless rock, consisting of orthoclase and mica, for which we have no name. 1945 Proc. Amer. Philos. Soc. 89 153/1 In the collection are quartz, quartzless, and other types of dolerites. 1991 F. H. Pough Peterson First Guide Rocks & Minerals 18 The resulting rock may be a quartzless feldspar rock known as syenite. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < adj.1871 |
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