Meaning

noun 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

originEtymology tree Proto-Indo-European *(s)meyk- Proto-Italic *(s)mīkā? Proto-Indo-European *meyk- Proto-Italic *meikā? Latin mīcabor. English mica Borrowed from Latin mīca (“grain, crumb”).

Etymology from Wiktionary, CC BY-SA 3.0