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.

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Look at other dictionaries:

  • Muscovite — Catégorie IX : silicates[1] Muscovite; sud est de Minas Gerais, Brésil …   Wikipédia en Français

  • muscovite — ● muscovite nom féminin (anglais Muscovy, Moscovie) Variété de mica blanc qui est un silicate hydraté naturel d aluminium et de potassium, que l on rencontre dans les granites et les micaschistes. (Elle est utilisée industriellement comme isolant …   Encyclopédie Universelle

  • Muscovite — ► NOUN 1) a native or citizen of Moscow. 2) (muscovite) a silver grey form of mica. ► ADJECTIVE ▪ relating to Moscow …   English terms dictionary

  • 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

  • Muscovite — [mus′kə vīt΄] n. 1. a) a person born or living in Muscovy b) a Russian 2. a person born or living in Moscow adj. 1. a) of Muscovy b) Russian …   English World dictionary

  • muscovite — [mus′kə vīt΄] n. [formerly called Muscovy glass: see ITE1] a very common, light colored, soft mica, hydrous potassium aluminum silicate, KAl2 (AlSi3)O10 (OH) 2, used as an electrical or thermal insulator …   English World dictionary

  • Muscovite — For other uses, see Muscovite (disambiguation). Muscovite Muscovite with albite from Doce valley, Minas Gerais, Brazil (dimensions: 6×5.3×3.9 cm) General Catego …   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

  • Muscovite — UK [ˈmʌskəvaɪt] / US [ˈmʌskəˌvaɪt] noun [countable] Word forms Muscovite : singular Muscovite plural Muscovites someone from Moscow Derived word: Muscovite UK / US adjective …   English dictionary

  • muscovite — noun Etymology: Medieval Latin or New Latin Muscovia, Moscovia Moscow Date: 1535 1. capitalized a. a native or resident of the ancient principality of Moscow or of the city of Moscow b. Russian 2. [muscovy (glass)] a colorless to pale brown form… …   New Collegiate Dictionary

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