micaceous

[mahy-key-shuhs]
adjective
1.
consisting of, containing, or resembling mica.
2.
of or pertaining to mica.

Origin:
1765–75; mic(a) + -aceous

unmicaceous, adjective
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World English Dictionary
mica (ˈmaɪkə)
 
n
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
 
[C18: from Latin: grain, morsel]
 
micaceous
 
adj

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Example sentences
The quartzite members are thinly bedded and commonly micaceous or graphitic.
Flakes of raw vermiculite concentrate are micaceous in appearance and contain interlayer water in their structure.
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