Mica

4 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  mica
       n : any of various minerals consisting of hydrous silicates of
           aluminum or potassium etc. that crystallize in forms that
           allow perfect cleavage into very thin leaves; used as
           dielectrics because of their resistance to electricity
           [syn: {isinglass}]

From Virtual Entity of Relevant Acronyms (Version 1.9, June 2002) [vera]:

  MICA
       MODEM ISDN Channel Integration (Telebit, MODEM, ISDN)
       
       

From U.S. Gazetteer (1990) [gazetteer]:

  Mica, WA
    Zip code(s): 99023