柯林斯词典gneiss /naɪs/ 1. N any coarse-grained metamorphic rock that is banded and foliated: represents the last stage in the metamorphism of rocks before melting 片麻岩 返回 gneiss剑桥词典a type of metamorphic rock that contains light and dark layers formed of minerals such as quartz and mica 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） 返回 gneiss