microbeadsnoun [ plural ]
uk/ˈmaɪ.krəʊ.biːdz//ˈmaɪ.kroʊ.biːdz/very small pieces of plastic that are added to products for cleaning the skin:
Microbeads, used in hundreds of personal care products like skin exfoliants and soap, can slip through water treatment systems and then become part of the plastic pollution of the oceans.