Silica
['sɪlɪkə]
Definition
(noun.) a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite.
Inputed by Delia--From WordNet
Definition
(n.) Silicon dioxide, SiO/. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder.
Checked by Bernie
Synonyms and Synonymous
n. Silex.
Typed by Josephine
Definition
n. silicon dioxide or silicic anhydride a white or colourless substance the most abundant solid constituent of our globe existing both in the crystalline and in the amorphous form the best examples of the former being rock-crystal quartz chalcedony flint sandstone and quartzose sand; of the latter opal.—n. Sil′icate a salt of silicic acid.—adjs. Sil′icāted combined or impregnated with silica; Silic′ic pertaining to or obtained from silica; Silicif′erous producing or containing silica.—n. Silicificā′tion conversion into silica.—v.t. Silic′ify to convert into silica: to render silicious.—v.i. to become silicious or flinty:—pr.p. silic′ifying; pa.p. silic′ifīed.—adjs. Silic′ious Silic′eous pertaining to containing or resembling silica.—n. Sil′icon or Silic′ium the base of silica a non-metallic elementary substance obtainable in three different forms the amorphous the graphitoid and the crystalline.
Checker: Victoria
Examples
- Silica is also met with in the carnelian and we find it constituting jasper, agate, cat’s-eye, onyx and opals. Various. The Wonder Book of Knowledge.
- Rub the fossil silica to a fine powder and thoroughly mix with the chalk. William K. David. Secrets of Wise Men, Chemists and Great Physicians.
- Prepared chalk or whiting can be used instead of fossil silica. William K. David. Secrets of Wise Men, Chemists and Great Physicians.
- They are found in volcanic regions and are supposed to be due to the action of hot water, which carried off the organic material and deposited dissolved silica in its place. Various. The Wonder Book of Knowledge.
- Many natural waters present us with silica in a dissolved state, although it is not soluble in pure water. Various. The Wonder Book of Knowledge.
- There were many things which went through the system without injury; for instance, silica, of which most people took a great deal in the twenty-four hours. William K. David. Secrets of Wise Men, Chemists and Great Physicians.
- The silica, which is the principal ingredient of sand, as well as of nearly all the earthy minerals, is known as rock crystal in its naturally crystallized form. Various. The Wonder Book of Knowledge.
- The following is the record of the results: RESULTS OF WORKING BRIQUETTES AT THE CRANE FURNACE Quantity of Phos- ManDate Briquette Tons Silica phorus Sulphur ganese Working Per Cent. Frank Lewis Dyer. Edison, His Life and Inventions.
- He discovered silica in the epidermis of the stems of weeds, corn, and grasses. Rupert S. Holland. Historic Inventions.
- The resistance offered by silica to all impressions is exemplified in the case of flint which consists essentially of silica colored with some impurity. Various. The Wonder Book of Knowledge.
Checker: Salvatore