microplastic

noun

mi·​cro·​plas·​tic ˌmī-krō-ˈpla-stik 

plural microplastics

1

: a very small piece of plastic especially when occurring as an environmental pollutant

—usually used in plural

… the microplastics that have made their way into the food chain and even the air we breathe.

—Los Angeles Times

… the Mariana Trench contains the highest levels of microplastics (most likely from clothing, bottles, packaging and fishing gear) yet found in the open ocean, offering irrefutable proof that plastics have penetrated even the most remote places on the planet.

—Rina Li

specifically : a piece of plastic that is five millimeters or smaller in size

Indeed, a handful of sand or cup of seawater from nearly anywhere in the world will probably be peppered with microplastics—pieces that are tinier than a small pea and often invisible.

—Jennifer Ackerman

2

: material consisting of microplastics

Most of that microplastic is coming not from broken down plastic soda bottles or shopping bags but textiles and clothing made of synthetic materials like polyester.

—Dharna Noor

compare nanoplastic

microplastic adjective

microplastic pollution

microplastic debris

Examples of microplastic in a Sentence

Recent Examples on the Web

Investing in a microplastics filter, such as a Guppyfriend bag or a Cora ball, can help tackle the issue, while purchasing synthetic clothing should be avoided where possible. —Emily Chan, Vogue, 22 Dec. 2024

Tires are an important source of microplastics because friction from driving wears them down — sending fragments into the air. —Sharon Udasin, The Hill, 18 Dec. 2024

Research finds microplastics in our stool and urine. —Will Stone, NPR, 18 Dec. 2024

Luckily, the LifeStraw personal water filter helps keep you hydrated while out and about by protecting you against everything from bacteria and microplastics to microsilt and sand. —Jamie Spain, Condé Nast Traveler, 17 Oct. 2024

Word History

First Known Use

1990, in the meaning defined at sense 1