资料来源 : pyDict

片麻岩

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Gneiss \Gneiss\ (n[imac]s), n. [G.] (Geol.)
   A crystalline rock, consisting, like granite, of quartz,
   feldspar, and mica, but having these materials, especially
   the mica, arranged in planes, so that it breaks rather easily
   into coarse slabs or flags. Hornblende sometimes takes the
   place of the mica, and it is then called {hornblendic or
   syenitic gneiss}. Similar varieties of related rocks are also
   called gneiss.

资料来源 : WordNet®

gneiss
     n : a laminated metamorphic rock similar to granite