- rock crystal
- quartz; a transparent form of silicon dioxide (silica), SiO2; used for lenses.
Medical dictionary. 2011.
rock crystal
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Rock crystal — Rock Rock, n. [OF. roke, F. roche; cf. Armor. roc h, and AS. rocc.] 1. A large concreted mass of stony material; a large fixed stone or crag. See {Stone}. [1913 Webster] Come one, come all! this rock shall fly From its firm base as soon as I. Sir … The Collaborative International Dictionary of English
Rock crystal — Crystal Crys tal (kr[i^]s tal), n. [OE. cristal, F. cristal, L. crystallum crystal, ice, fr. Gr. kry stallos, fr. kry os icy cold, frost; cf. AS. crystalla, fr. L. crystallum; prob. akin to E. crust. See {Crust}, {Raw}.] 1. (Chem. & Min.) The… … The Collaborative International Dictionary of English
rock crystal — Crystal Crys tal (kr[i^]s tal), n. [OE. cristal, F. cristal, L. crystallum crystal, ice, fr. Gr. kry stallos, fr. kry os icy cold, frost; cf. AS. crystalla, fr. L. crystallum; prob. akin to E. crust. See {Crust}, {Raw}.] 1. (Chem. & Min.) The… … The Collaborative International Dictionary of English
rock crystal — ► NOUN ▪ transparent quartz, typically in the form of colourless hexagonal crystals … English terms dictionary
rock crystal — n. a transparent, esp. colorless, quartz … English World dictionary
rock crystal — transparent quartz, esp. when colorless. [1660 70] * * * Transparent variety of the silica mineral quartz that is valued for its clarity and total lack of colour or flaws. Rock crystal formerly was used extensively as a gemstone, but it has been… … Universalium
rock crystal — kalnų krištolas statusas T sritis chemija apibrėžtis Bespalvis, skaidrus kvarcas. formulė SiO₂ atitikmenys: angl. rock crystal rus. горный хрусталь … Chemijos terminų aiškinamasis žodynas
rock crystal — rock′ crys tal n. mir transparent quartz, esp. when colorless • Etymology: 1660 … From formal English to slang
Rock crystal vase — A rock crystal vase is a vase made of rock crystal. Some such vases were rare expensive items, decorated with gold and jewels, used by royalty in Europe.A rock crystal vase that probably originated in the seventh century was given to William IX… … Wikipedia
Rock crystal ewer — Carved from a single block of rock crystal, this ewer is a work of outstanding quality. It is one of a series that survives in collections across Europe. They are often in cathedral treasuries, where they were rededicated after being captured… … Wikipedia
rock crystal — noun Date: 1666 crystal 1 … New Collegiate Dictionary
