silicate

[sil-i-kit, -keyt]
noun
1.
Mineralogy. any of the largest group of mineral compounds, as quartz, beryl, garnet, feldspar, mica, and various kinds of clay, consisting of SiO 2 or SiO 4 groupings and one or more metallic ions, with some forms containing hydrogen. Silicates constitute well over 90 percent of the rock-forming minerals of the earth's crust.
2.
Chemistry. any salt derived from the silicic acids or from silica.

Origin:
1805–15; silic(a) + -ate2

silication [sil-i-key-shuhn] , noun
nonsilicate, noun
subsilicate, noun
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World English Dictionary
silicate (ˈsɪlɪkɪt, -ˌkeɪt)
 
n
a salt or ester of silicic acid, esp one of a large number of usually insoluble salts with polymeric negative ions having a structure formed of tetrahedrons of SiO4 groups linked in rings, chains, sheets, or three dimensional frameworks. Silicates constitute a large proportion of the earth's minerals and are present in cement and glass

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American Heritage
Medical Dictionary

silicate sil·i·cate (sĭl'ĭ-kāt', -kĭt)
n.
Any of numerous compounds containing silicon, oxygen, and one or more metals; a salt of silicic acid.

The American Heritage® Stedman's Medical Dictionary
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American Heritage
Science Dictionary
silicate   (sĭl'ĭ-kāt')  Pronunciation Key 
  1. Any of a large class of chemical compounds composed of silicon, oxygen, and at least one metal. Most rocks and minerals are silicates.

  2. Any mineral containing the group SiO4, either isolated, or joined to other groups in chains, sheets, or three-dimensional groups with metal elements. Micas and feldspars are silicate minerals.


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American Heritage
Cultural Dictionary
silicates [(sil-uh-kuhts, sil-uh-kayts)]

The main minerals found in many rocks. Silicates are composed of atoms of silicon, oxygen, and elements such as potassium, sodium, or calcium, under great heat and pressure. Silicates make up about one-quarter of the crust of the Earth.

Note: Mica and quartz are silicates.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
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Example sentences
For instance, both bodies contain minerals known as carbonates and hydrated silicates.
It explains based on basic principles of chemistry why phosphates rather than arsenates or silicates have been chosen by life.
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