mica

noun

mi·​ca ˈmī-kə 

: any of various colored or transparent mineral silicates crystallizing in monoclinic forms that readily separate into very thin leaves

micaceous

mī-ˈkā-shəs 

adjective

Examples of mica in a Sentence

Recent Examples on the Web

While these work to reveal a radiant, supple complexion, mica, and powder pigments promote a smooth, even base. —Kiana Murden, Vogue, 31 Jan. 2025

On the other end of this pen is a moisturizing lip treatment that plumps skin with vitamin E while blue mica pigments neutralize the look of yellow tones on your teeth, creating an instant whitening effect. —Jennifer Hussein, Allure, 9 Jan. 2025

Pyrrhotite oxidation, not mica’s absorption of water, was driving the concrete apart, their chemical analyses of building material showed. —The Editors, JSTOR Daily, 31 Dec. 2024

Since gaining public recognition in 2013, a spate of crumbling buildings in Ireland has been known as the mica crisis or scandal. —The Editors, JSTOR Daily, 31 Dec. 2024

Word History

Etymology

New Latin, from Latin, grain, crumb; perhaps akin to Greek mikros small

First Known Use

1777, in the meaning defined above

Kids Definition

mica

noun

mi·​ca ˈmī-kə 

: any of various minerals that contain silicon and can be separated easily into thin often transparent sheets

Medical Definition

mica

noun

mi·​ca ˈmī-kə 

: any of various colored or transparent mineral silicates crystallizing in monoclinic forms that readily separate into very thin leaves

micaceous

mī-ˈkā-shəs 

adjective