- 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 laminae; isinglass.
Origin of mica
Examples from the Web for mica
Among them Mica Mosbacher, who is now a regent at the University of Houston.Anita Perry’s Political Baggage
October 13, 2011
But Mica also wisely created a provision that allowed airports to opt-out of the TSA and use private screeners instead.TSA, Don't Touch My Junk!
November 19, 2010
The consequence was a vibration of the mica diaphragm to which the stylus was attached.Heroes of the Telegraph
We can look upon the demand for mica as being in a certain sense settled.
The mica has more than paid the working of the mine, and all the rest is clear profit.
They are mining for mica, but the mine is more valuable in other respects than it is as a mica property.
It is thus, thought we, that our manufacturers of fancy wax deal by their mica.Leading Articles on Various Subjects
- any of a group of lustrous rock-forming minerals consisting of hydrous silicates of aluminium, potassium, etc, in monoclinic crystalline form, occurring in igneous and metamorphic rock. Because of their resistance to electricity and heat they are used as dielectrics, in heating elements, etc
Word Origin and History for mica
1706, from specialized use of Latin mica "crumb, bit, morsel, grain," originally *smika (form probably influenced by Latin micare "to flash, glitter"), from PIE *smik- "small" (cf. Greek smikros, Attic mikros "small;" Old High German smahi "littleness"). Related: Micaceous "containing mica."
- Any of a group of hydrous aluminosilicate minerals with the general formula (K,Na,Ca)(Mg,Fe,Li,Al)2-3(Al,Si)4O10(OH,F)2that can be split easily into thin, partly transparent sheets. Mica is common in igneous and metamorphic rocks and often occurs as flakes or sheets. It is highly resistant to heat and is used in electric fuses and other electrical equipment. Muscovite and biotite are types of mica