
1) Igneous rock
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https://www.crosswordclues.com/clue/silicic

Silicic is an adjective to describe magma or igneous rock rich in silica. The amount of silica that constitutes a silicic rock is usually put at at least 65 percent. Granite and rhyolite are the most common silicic rocks. Silicic is the group of silicate magmas which will eventually crystallise a relatively small proportion of ferromagnesian silic...
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http://en.wikipedia.org/wiki/Silicic

• (a.) Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as, silicic acid.
Found on
http://thinkexist.com/dictionary/meaning/silicic/

<chemistry> Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as, silicic acid. ... <chemistry> Silicic acid, an amorphous gelatinous substance, Si(HO)4, very unstable and easily dried to silica, but forming many stable salts. ... Synonym: orthosilicic, or normal silicic, acid. ... Origi...
Found on
http://www.encyclo.co.uk/local/20973
Si·lic'ic adjective [ Latin
silex ,
silicis , a flint: confer French
silicique .]
(Chemistry) Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as,
silicic acid.
Silicic acid (Chemistry) ,
an amo...
Found on http://www.encyclo.co.uk/webster/S/102
Type: Term Pronunciation: si-lis′ik Definitions: 1. Relating to silica or silicon.
Found on http://www.medilexicon.com/medicaldictionary.php?t=82115
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