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silicate

[sil-i-kit, -keyt]

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noun

Mineralogy. any of the largest group of mineral compounds, as quartz, beryl, garnet, feldspar, mica, and various kinds of clay, consisting of SiO₂ or SiO₄ 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.

Chemistry. any salt derived from the silicic acids or from silica.

Origin:
1805–15; silic(a) + -ate²

Related forms

sil·i·ca·tion

[sil-i-key-shuhn] , noun

non·sil·i·cate, noun

sub·sil·i·cate, noun

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Silicate is always a great word to know.

So is ninnyhammer. Does it mean:

a chattering or flighty, light-headed person.

a fool or simpleton; ninny.

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Collins

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

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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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.

American Heritage

Science Dictionary

silicate

(sĭl'ĭ-kāt') Pronunciation Key

Any of a large class of chemical compounds composed of silicon, oxygen, and at least one metal. Most rocks and minerals are silicates.
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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