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.

(faintly), , / (of faint, unsteady light), , / , , ,

Look at other dictionaries:

  • Glimmer — may refer to: *one of the names given to a reflective device used for cheating at cards. The glimmer or glim, which normally will be an unassuming item such as a shiny Zippo lighter, is placed on the table in such a way that the reflection of… …   Wikipedia

  • GLIMMER — stands for Gene Locator and Interpolated Markov ModelER. GLIMMER was the first bioinformatics system for finding genes that used the interpolated Markov model formalism. It is very effective at finding genes in bacteria, archaea, and viruses,… …   Wikipedia

  • Glimmer — Glimmer, Minerale, Verbindungen von kieselsaurer Tonerde mit kieselsauren Alkalien und Magnesia, kristallisieren monoklin, und zwar als sechsseitige Prismen mit einem Kantenwinkel von nahezu 120°. Das Bezeichnende dieser Minerale ist ihre… …   Lexikon der gesamten Technik

  • Glimmer — Glim mer, v. i. [imp. & p. p. {Glimmered}; p. pr. & vb. n. {Glimmering}.] [Akin to G. glimmer a faint, trembling light, mica, glimmern to glimmer, glimmen to shine faintly, glow, Sw. glimma, Dan. glimre, D. glimmen, glimpen. See {Gleam} a ray,… …   The Collaborative International Dictionary of English

  • Glimmer — Glim mer, n. 1. A faint, unsteady light; feeble, scattered rays of light; also, a gleam. [1913 Webster] Gloss of satin and glimmer of pearls. Tennyson. [1913 Webster] 2. Mica. See {Mica}. Woodsward. [1913 Webster] {Glimmer gowk}, an owl. [Prov.… …   The Collaborative International Dictionary of English

  • Glimmer — (Mica, Mika, Katzengold, Katzensilber), Mineralien, meist deutlich kristallisiert in monoklinen Tafeln und Prismen von hexagonalem oder rhombischem Umriß, ausgezeichnet durch eine sehr vollkommene Spaltbarkeit nach der Tafelfläche oder Endfläche… …   Meyers Großes Konversations-Lexikon

  • glimmer — [n] flash, sparkle blink, coruscation, flicker, glance, gleam, glint, glow, grain, hint, inkling, ray, scintillation, shimmer, suggestion, trace, twinkle; concepts 624,831 Ant. dullness glimmer [v] sparkle blink, coruscate, fade, flash, flicker,… …   New thesaurus

  • glimmer — ► VERB ▪ shine faintly with a wavering light. ► NOUN 1) a faint or wavering light. 2) a faint sign of a feeling or quality: a glimmer of hope. DERIVATIVES glimmering adjective & noun. ORIGIN probably Scandinavian …   English terms dictionary

  • Glimmer — Glimmer, mit diesem Namen begreift man eine Anzahl von Mineralien, welche durch ihre sechsseitige tafelförmige, theils hexagonale, theils klinorhombische (monoklinoëdrische) Krystallgestalt (hexagonaler u. klinorhombischer G.), ferner durch ihre… …   Pierer's Universal-Lexikon

  • Glimmer — Glimmer, monoklin kristallisierende, scheinbar aber hexagonal entwickelte wasserhaltige Silikate von Tonerde und Kali (oder Natron), vielfach mit Magnesia und Eisenoxydul, Mineralien mit ausgezeichneter basischer Spaltbarkeit. Hauptarten: Kali G …   Kleines Konversations-Lexikon

  • Glimmer — Glimmer, Mineral zur Ordnung der Thonerde gehörig, in 2 und 1achsigen G. eingetheilt. Ersterer hat 2 Arten, den Kali oder gemeinen G., und den Lithon G. Härte von 2–2,5 und ein spec. Gewicht von 2,86–3, sind elastisch, farblos od. silberweiß,… …   Herders Conversations-Lexikon