mica

名词 mica:

1. 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
   同义词：isinglass

mi.ca

n.（名词）
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.
云母：化学上和物理上有联系的铝硅酸盐矿物群的总称，常见于火成岩和变质岩中，以易裂成柔软的薄片为特征，用于绝缘体及电气设备中

来源：
Latin [grain] perhaps influenced by Latin mic3re [to flash]
拉丁语 [谷物] 可能受 拉丁语 mic3re的影响 [闪光]

【引伸】
mica.ceous