microbead

[ mahy-kroh-beed ]
/ ˈmaɪ kroʊˌbid /

noun

Usually microbeads. a tiny particle of plastic, usually smaller than two millimeters, used in such personal care products as body washes, facial scrubs, and toothpastes: The microbeads help to exfoliate your skin.

Origin of microbead

First recorded in 1965–70; micro- + bead