mica

mi·ca  (mk)

n.

Any of a group of chemically and physically related aluminum silicate minerals, common in igneous and metamorphic rocks, characteristically splitting into flexible sheets used in insulation and electrical equipment.

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[Latin mca, grain (perhaps influenced by micre, to flash).]

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mi·caceous (-kshs) adj.

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mica [my-ka]

Noun

any of a group of minerals consisting of flakelike crystals of aluminium or potassium silicates. They have a high resistance to electricity and heat [Latin: crumb]

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mica  (mk)

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

Thesaurus

Noun

1.

mica - 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 isinglass mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition biotite - dark brown to black mica found in igneous and metamorphic rock lepidolite - a mineral of the mica group; an important source of lithium muscovite - a colorless or pale brown mica with potassium paragonite - a colorless or pale brown mica with sodium phlogopite - a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum translucent substance, transparent substance - a material having the property of admitting light diffusely; a partly transparent material zinnwaldite - a mica containing iron and lithium