gneiss
noun [ U ] geology specialized uk/naɪs/ us/naɪs/
片麻岩（由长石﹑石英组成﹐中粗粒变晶结构和片麻状或条带状构造的变质岩）
a type of metamorphic rock that contains light and dark layers formed of minerals such as quartz and mica
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。