Definition of Gneiss

1. Noun. A laminated metamorphic rock similar to granite.

Generic synonyms: Metamorphic Rock



Definition of Gneiss

1. n. 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.

Definition of Gneiss

1. Noun. (geology) A common and widely-distributed metamorphic rock having bands or veins, but not schistose. ¹

¹ Source: wiktionary.com

Definition of Gneiss

1. a type of rock [n -ES] : GNEISSIC [adj]

Medical Definition of Gneiss

1. 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. Origin: G. Source: Websters Dictionary (01 Mar 1998)

Gneiss Pictures

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Lexicographical Neighbors of Gneiss

gnatworms
gnaw at
gnaw someone's vitals
gnawable
gnawed
gnawer
gnawers
gnawing
gnawing animal
gnawing mammal
gnawingly
gnawings
gnawn
gnaws
gneiss (current term)
gneisses
gneissic
gneissoid
gneissoids
gneissose
gnetum
gnide
gnit
gnocchi
gnocchis
gnod
gnof
gnoff
gnoll

Literary usage of Gneiss

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Data of Geochemistry by Frank Wigglesworth Clarke (1908)
"gneiss. The gneisses form the largest group of metamorphic rocks, and represent both ... He defines gneiss as a " laminated metamorphic rock, which usually ..."

2. An Introduction to Geology by William Berryman Scott (1897)
"gneiss is a term of wide significance, which includes a number of rocks of different modes of ... The varieties of gneiss are ordinarily named in accordance ..."

3. Text-book of Geology by Archibald Geikie (1885)
"Here and there, too, the crumpled folia of gneiss pass into pegmatite ... At Cape Wrath, alternate thin layers of gneiss and pegmatite occur with as perfect ..."

4. An Introduction to Geology: Intended to Convey a Practical Knowledge of the by Robert Bakewell, Benjamin Silliman (1833)
"THE principal primary rocks, enumerated with granite in the preceding chapter, were gneiss and Mica-slate. With these, certain rocks are frequently ..."

5. Geological Observations on South America: Being the Third Part of the by Charles Darwin (1846)
"The prevailing rock is gneiss, often passing, by the disappearance of the ... In the gneiss, concretions of granular feldspar and others of garnets with ..."

6. Dictionary of National Biography by LESLIE. STEPHEN (1895)
"The so-called ' newer gneiss ' is nothing more than a part of the ma.", to which the older gneiss belongs, brought up by a system of gigantic folds and ..."

7. The American Naturalist by American Society of Naturalists, Essex Institute (1897)
"They often occur in bands and are always elongated parallel to the foliation of the gneiss in which they lie. The rock shows abundant evidence of mashing, ..."

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