gneiss
gneiss[nʌɪs]noun- [mass noun]a metamorphic rock with a banded or foliated structure, typically coarse-grained and consisting mainly of feldspar, quartz, and mica
片麻岩
派生gneissicadjectivegneissoseadjective语源- mid 18th cent.: from German, from Old High German gneisto 'spark' (because of the rock's sheen)
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