"sparkling," 1836, from Late Latin micāre "to shine, sparkle, flash, glitter, quiver," from PIE *mik-(e)ie- "to blink" (source also of Czech mikati "to move abruptly," Upper Sorbian mikac "to blink").
Entries linking to micacious
mica n.
type of mineral that can be separated easily into extremely thin, tough laminae, 1706, from a Modern Latin specialized use of Latin mica "crumb, bit, morsel, grain." This is sometimes said to be from the same source as Attic Greek mikros "small" (see micro-). The word was applied to the mineral probably on the supposition that it was related to Latin micare "to flash, glitter" (see micacious). However a recent theory of the origin of the Latin noun does derive it from the same root as micare, on the notion of "a glittering crystalline particle" (originally a grain of salt), which de Vaan finds "formally more attractive" than the connection to the Greek word. Older native names for it were glimmer and cat-silver. Related: Micaceous "containing mica" (1748).