wordswarm: free dictionary lookup
||look up a word or phrase||
Wordswarms From Years Past|
Adjacent Wordscherry tree
CHERUBIC, FORMS IN THE CONSTELLATIONS
Full-text Search for "Chert"
Some Other Sites
CHERT, n. In mineralogy, a subspecies of rhomboidal quartz; called also hornstone, petrosilex or rock flint. It is less hard than common quartz; its fracture usually dull and splintery, sometimes more or less conchoidal. It is more or less translucent, sometimes at the edges, and sometimes the whole mass, if thin, has the strong translucency of certain horns. Its colors are numerous and usually dull. It is usually amorphous, sometimes globular, or in nodules. It occurs often in veins, especially metallic, in primitive mountains.
noun Etymology: origin unknown Date: 1679 a rock resembling flint and consisting essentially of a large amount of fibrous chalcedony with smaller amounts of cryptocrystalline quartz and amorphous silica • cherty adjective
n. a flintlike form of quartz composed of chalcedony. Derivatives: cherty adj. Etymology: 17th c.: orig. unkn.
Chert Chert, n. [Ir. ceart stone, perh. akin to E. crag.] (Min.) An impure, massive, flintlike quartz or hornstone, of a dull color.
Hornstone Horn"stone`, n. (Min.) A siliceous stone, a variety of quartz, closely resembling flint, but more brittle; -- called also chert.