Search Result for "gneiss": 
Wordnet 3.0

NOUN (1)

1. a laminated metamorphic rock similar to granite;


The Collaborative International Dictionary of English v.0.48:

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 gneiss or syenitic gneiss. Similar varieties of related rocks are also called gneiss. [1913 Webster]
WordNet (r) 3.0 (2006):

gneiss n 1: a laminated metamorphic rock similar to granite
Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "gneiss": aa, abyssal rock, basalt, bedrock, block lava, brash, breccia, conglomerate, crag, druid stone, festooned pahoehoe, granite, igneous rock, lava, limestone, living rock, magma, mantlerock, metamorphic rock, monolith, pahoehoe, pillow lava, porphyry, pudding stone, regolith, rock, ropy lava, rubble, rubblestone, sandstone, sarsen, schist, scoria, scree, sedimentary rock, shelly pahoehoe, stone, talus, tufa, tuff