muscovy glass
Mica Mi"ca, n. [L. mica crumb, grain, particle; cf. F. mica.] (Min.) The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in composition, and vary in color from pale brown or yellow to green or black. The transparent forms are used in lanterns, the doors of stoves, etc., being popularly called {isinglass}. Formerly called also {cat-silver}, and {glimmer}. [1913 Webster]

Note: The important species of the mica group are: {muscovite}, common or potash mica, pale brown or green, often silvery, including {damourite} (also called {hydromica} and {muscovy glass}); {biotite}, iron-magnesia mica, dark brown, green, or black; {lepidomelane}, iron, mica, black; {phlogopite}, magnesia mica, colorless, yellow, brown; {lepidolite}, lithia mica, rose-red, lilac. [1913 Webster] Mica (usually muscovite, also biotite) is an essential constituent of granite, gneiss, and mica slate; {biotite} is common in many eruptive rocks; {phlogopite} in crystalline limestone and serpentine. [1913 Webster]

{Mica diorite} (Min.), an eruptive rock allied to diorite but containing mica (biotite) instead of hornblende.

{Mica powder}, a kind of dynamite containing fine scales of mica.

{Mica schist}, {Mica slate} (Geol.), a schistose rock, consisting of mica and quartz with, usually, some feldspar. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Muscovy glass — Mus co*vy glass [From Muscovy, the old name of Russia: cf. F. verre de Moscovie.] Mica; muscovite. See {Mica}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Muscovy (disambiguation) — Muscovy (also Moscovia, Moscovie, Moskovia; in Russian: Московия) is a historical European term for the Principality of Moscow and the Grand Duchy of Moscow. It may also refer to one of the following: An inaccurate name for the Grand Duchy of… …   Wikipedia

  • Muscovite — /mus keuh vuyt /, n. 1. a native or inhabitant of Moscow. 2. a native or inhabitant of the Grand Duchy of Muscovy. 3. (l.c.) Mineral. common light colored mica, essentially KAl3Si3O10(OH)2, used as an electrical insulator. 4. Archaic. a Russian.… …   Universalium

  • Mus|co|vite — «MUHS kuh vyt», noun. a light colored variety of mica. ╂[< Muscovy (glass) + ite1] Mus|co|vite «MUHS kuh vyt», noun, adjective. –n. 1. a native or inhabitant of Moscow. 2. = Russian. (Cf. ↑Russian) …   Useful english dictionary

  • mus|co|vite — «MUHS kuh vyt», noun. a light colored variety of mica. ╂[< Muscovy (glass) + ite1] Mus|co|vite «MUHS kuh vyt», noun, adjective. –n. 1. a native or inhabitant of Moscow. 2. = Russian. (Cf. ↑Russian) …   Useful english dictionary

  • Darby Field — (1610–1649) was the first European to climb Mount Washington in New Hampshire. Of Irish ancestry, if not born in Ireland, he was in Boston, Massachusetts, by 1636 and settled in Durham, New Hampshire, by 1638, where he ran a ferry from what is… …   Wikipedia

  • mica — micalike, adj. /muy keuh/, n. any member of a group of minerals, hydrous silicates of aluminum with other bases, chiefly potassium, magnesium, iron, and lithium, that separate readily into thin, tough, often transparent, and usually elastic… …   Universalium

  • Glossary of geology terms — Here is a glossary of Geological terms.A*Abyssal plain Flat or very gently sloping areas of the deep ocean basin floor. *Absolute dating the process of determining a specific date (in years or some other unit of time) for an archaeological,… …   Wikipedia

  • KAl3Si3O10OH2 — Muscovite Mus co*vite, n. [See {Muscovy glass}.] 1. A native or inhabitant of Muscovy or ancient Russia; hence, a Russian. [1913 Webster] 2. An inhabitant of Moscow. [PJC] 3. (Min.) Common potash mica, essentially {KAl3Si3O10(OH)2}. It is used as …   The Collaborative International Dictionary of English

  • Muscovite — Mus co*vite, n. [See {Muscovy glass}.] 1. A native or inhabitant of Muscovy or ancient Russia; hence, a Russian. [1913 Webster] 2. An inhabitant of Moscow. [PJC] 3. (Min.) Common potash mica, essentially {KAl3Si3O10(OH)2}. It is used as an… …   The Collaborative International Dictionary of English

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