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1. (n.) mica
any member of a group of minerals, hydrous silicates of aluminum usu. with potassium, sodium, or calcium, that separate readily into thin, tough, often transparent laminae.
Etymology: (1700–10; < L mīca crumb, grain)
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| Definition of 'MICA' |
Princeton's WordNet |
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1. (noun) mica, isinglass
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
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| Definition of 'MICA' |
Webster Dictionary |
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1. (noun) MICA
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
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| Definition of 'MICA' |
The Standard Electrical Dictionary |
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1. MICA
A natural mineral, a silicate of several oxides; muscovite. It is used as an insulator and dielectric. Its resistance per centimeter cube after several minutes electrification at 20º C. (68º F.) is 8.4E13 ohms (Ayrton). Its specific inductive capacity is 5, air being taken at 1.
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Definitions of MICA 
